./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs --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 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:31:06,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:31:06,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:31:06,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:31:06,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:31:06,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:31:06,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:31:06,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:31:06,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:31:06,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:31:06,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:31:06,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:31:06,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:31:06,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:31:06,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:31:06,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:31:06,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:31:06,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:31:06,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:31:06,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:31:06,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:31:06,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:31:06,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:31:06,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:31:06,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:31:06,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:31:06,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:31:06,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:31:06,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:31:06,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:31:06,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:31:06,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:31:06,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:31:06,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:31:06,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:31:06,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:31:06,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:31:06,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:31:06,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:31:06,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:31:06,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:31:06,874 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:31:06,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:31:06,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:31:06,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:31:06,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:31:06,907 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:31:06,907 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:31:06,908 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:31:06,908 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:31:06,909 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:31:06,909 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:31:06,909 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:31:06,910 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:31:06,910 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:31:06,910 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:31:06,911 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:31:06,911 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:31:06,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:31:06,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:31:06,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:31:06,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:31:06,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:31:06,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:31:06,914 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:31:06,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:31:06,915 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:31:06,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:31:06,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:31:06,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:31:06,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:31:06,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:31:06,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:31:06,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:31:06,918 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:31:06,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:31:06,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:31:06,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:31:06,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:31:06,919 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_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 [2021-11-19 14:31:07,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:31:07,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:31:07,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:31:07,275 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:31:07,276 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:31:07,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-19 14:31:07,359 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/data/1b63de43d/89cedebdc7a14ddb94322478ed8b10ac/FLAG2417c1d48 [2021-11-19 14:31:08,443 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:31:08,445 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-19 14:31:08,499 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/data/1b63de43d/89cedebdc7a14ddb94322478ed8b10ac/FLAG2417c1d48 [2021-11-19 14:31:08,819 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/data/1b63de43d/89cedebdc7a14ddb94322478ed8b10ac [2021-11-19 14:31:08,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:31:08,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:31:08,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:31:08,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:31:08,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:31:08,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:31:08" (1/1) ... [2021-11-19 14:31:08,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71dbe3ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:08, skipping insertion in model container [2021-11-19 14:31:08,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:31:08" (1/1) ... [2021-11-19 14:31:08,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:31:09,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:31:10,350 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:31:10,798 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:31:12,017 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-19 14:31:12,021 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-19 14:31:12,046 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:31:12,123 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) [2021-11-19 14:31:12,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@37c8b50f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:12, skipping insertion in model container [2021-11-19 14:31:12,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:31:12,125 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:31:12,127 INFO L158 Benchmark]: Toolchain (without parser) took 3299.57ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 57.8MB in the beginning and 84.7MB in the end (delta: -26.9MB). Peak memory consumption was 40.3MB. Max. memory is 16.1GB. [2021-11-19 14:31:12,128 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 102.8MB. Free memory was 59.8MB in the beginning and 59.8MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:31:12,130 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3294.38ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 57.8MB in the beginning and 84.7MB in the end (delta: -26.9MB). Peak memory consumption was 40.3MB. Max. memory is 16.1GB. [2021-11-19 14:31:12,132 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 102.8MB. Free memory was 59.8MB in the beginning and 59.8MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3294.38ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 57.8MB in the beginning and 84.7MB in the end (delta: -26.9MB). Peak memory consumption was 40.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5659]: 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_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs --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 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:31:14,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:31:14,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:31:14,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:31:14,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:31:14,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:31:14,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:31:14,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:31:14,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:31:14,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:31:14,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:31:14,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:31:14,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:31:14,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:31:14,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:31:14,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:31:14,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:31:14,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:31:14,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:31:14,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:31:14,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:31:14,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:31:14,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:31:14,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:31:14,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:31:14,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:31:14,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:31:14,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:31:14,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:31:14,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:31:14,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:31:14,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:31:14,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:31:14,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:31:14,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:31:14,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:31:14,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:31:14,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:31:14,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:31:14,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:31:14,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:31:14,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:31:15,037 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:31:15,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:31:15,039 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:31:15,039 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:31:15,039 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:31:15,040 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:31:15,040 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:31:15,040 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:31:15,040 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:31:15,040 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:31:15,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:31:15,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:31:15,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:31:15,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:31:15,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:31:15,042 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:31:15,042 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:31:15,042 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:31:15,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:31:15,043 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:31:15,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:31:15,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:31:15,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:31:15,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:31:15,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:31:15,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:31:15,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:31:15,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:31:15,045 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:31:15,045 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:15,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:31:15,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:31:15,046 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:31:15,046 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_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 [2021-11-19 14:31:15,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:31:15,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:31:15,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:31:15,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:31:15,556 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:31:15,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-19 14:31:15,657 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/data/8189337c6/45a172d7a1e74dd9af142312b1daf86b/FLAG8cd287169 [2021-11-19 14:31:16,829 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:31:16,830 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-19 14:31:16,894 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/data/8189337c6/45a172d7a1e74dd9af142312b1daf86b/FLAG8cd287169 [2021-11-19 14:31:17,120 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/data/8189337c6/45a172d7a1e74dd9af142312b1daf86b [2021-11-19 14:31:17,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:31:17,125 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:31:17,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:31:17,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:31:17,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:31:17,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:31:17" (1/1) ... [2021-11-19 14:31:17,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a1bdfc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:17, skipping insertion in model container [2021-11-19 14:31:17,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:31:17" (1/1) ... [2021-11-19 14:31:17,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:31:17,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:31:20,297 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-19 14:31:20,301 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-19 14:31:20,321 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:31:20,374 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:31:20,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:31:20,959 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-19 14:31:20,960 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-19 14:31:20,968 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:31:21,011 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:31:21,443 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-19 14:31:21,444 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-19 14:31:21,475 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:31:21,868 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:31:21,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:21 WrapperNode [2021-11-19 14:31:21,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:31:21,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:31:21,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:31:21,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:31:21,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:21" (1/1) ... [2021-11-19 14:31:22,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:21" (1/1) ... [2021-11-19 14:31:22,317 INFO L137 Inliner]: procedures = 406, calls = 2618, calls flagged for inlining = 190, calls inlined = 155, statements flattened = 4190 [2021-11-19 14:31:22,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:31:22,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:31:22,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:31:22,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:31:22,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:21" (1/1) ... [2021-11-19 14:31:22,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:21" (1/1) ... [2021-11-19 14:31:22,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:21" (1/1) ... [2021-11-19 14:31:22,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:21" (1/1) ... [2021-11-19 14:31:22,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:21" (1/1) ... [2021-11-19 14:31:22,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:21" (1/1) ... [2021-11-19 14:31:22,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:21" (1/1) ... [2021-11-19 14:31:22,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:31:22,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:31:22,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:31:22,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:31:22,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:21" (1/1) ... [2021-11-19 14:31:22,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:31:22,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:31:22,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:31:22,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:31:22,730 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_95 [2021-11-19 14:31:22,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_95 [2021-11-19 14:31:22,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 14:31:22,731 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 14:31:22,731 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-19 14:31:22,731 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-19 14:31:22,731 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 14:31:22,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 14:31:22,732 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_91 [2021-11-19 14:31:22,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_91 [2021-11-19 14:31:22,732 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_open [2021-11-19 14:31:22,732 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_open [2021-11-19 14:31:22,732 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 14:31:22,732 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-19 14:31:22,733 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-19 14:31:22,733 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resume [2021-11-19 14:31:22,733 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resume [2021-11-19 14:31:22,733 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-19 14:31:22,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-19 14:31:22,733 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-19 14:31:22,733 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-19 14:31:22,734 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-19 14:31:22,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-19 14:31:22,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:31:22,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-19 14:31:22,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:31:22,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:31:22,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 14:31:22,735 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-19 14:31:22,735 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-19 14:31:22,735 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_device_lock_of_kaweth_device [2021-11-19 14:31:22,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_device_lock_of_kaweth_device [2021-11-19 14:31:22,736 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resubmit_rx_urb [2021-11-19 14:31:22,736 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resubmit_rx_urb [2021-11-19 14:31:22,736 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-19 14:31:22,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-19 14:31:22,737 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-19 14:31:22,737 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-19 14:31:22,737 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_after_alloc [2021-11-19 14:31:22,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_after_alloc [2021-11-19 14:31:22,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 14:31:22,737 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 14:31:22,738 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-19 14:31:22,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-19 14:31:22,738 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-19 14:31:22,738 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-19 14:31:22,738 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-19 14:31:22,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-19 14:31:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_close [2021-11-19 14:31:22,742 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_close [2021-11-19 14:31:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_download_firmware [2021-11-19 14:31:22,743 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_download_firmware [2021-11-19 14:31:22,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:31:22,744 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-19 14:31:22,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-19 14:31:22,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:31:22,745 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-19 14:31:22,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-19 14:31:22,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:31:22,746 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-19 14:31:22,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 14:31:22,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 14:31:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 14:31:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_exclusive_spin_is_locked [2021-11-19 14:31:22,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_exclusive_spin_is_locked [2021-11-19 14:31:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert [2021-11-19 14:31:22,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert [2021-11-19 14:31:22,754 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-19 14:31:22,755 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-19 14:31:22,755 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-19 14:31:22,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-19 14:31:22,756 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-19 14:31:22,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-19 14:31:22,756 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2021-11-19 14:31:22,756 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2021-11-19 14:31:22,756 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-19 14:31:22,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-19 14:31:22,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 14:31:22,757 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_tx_timeout [2021-11-19 14:31:22,757 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_tx_timeout [2021-11-19 14:31:22,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:31:22,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:31:22,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:31:22,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_kaweth_driver_exit_11_2 [2021-11-19 14:31:22,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_kaweth_driver_exit_11_2 [2021-11-19 14:31:22,759 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-19 14:31:22,759 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-19 14:31:22,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:31:22,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:31:22,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 14:31:22,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 14:31:22,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 14:31:22,760 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 14:31:22,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 14:31:22,761 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-19 14:31:22,761 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-19 14:31:22,761 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_async_set_rx_mode [2021-11-19 14:31:22,761 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_async_set_rx_mode [2021-11-19 14:31:22,761 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-19 14:31:22,762 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-19 14:31:22,762 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-19 14:31:22,762 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-19 14:31:22,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:31:22,763 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-19 14:31:22,763 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-19 14:31:22,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:31:22,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:31:22,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 14:31:22,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 14:31:22,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:31:22,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:31:22,768 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-19 14:31:22,770 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-19 14:31:22,770 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-19 14:31:22,770 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-19 14:31:22,771 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-19 14:31:22,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-19 14:31:22,771 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2021-11-19 14:31:22,771 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2021-11-19 14:31:22,771 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-19 14:31:22,772 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-19 14:31:22,772 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-19 14:31:22,772 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-19 14:31:22,772 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-19 14:31:22,772 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-19 14:31:22,772 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_set_rx_mode [2021-11-19 14:31:22,772 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_set_rx_mode [2021-11-19 14:31:22,772 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-19 14:31:22,772 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-19 14:31:22,772 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-19 14:31:22,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-19 14:31:22,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 14:31:22,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 14:31:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 14:31:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 14:31:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 14:31:22,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 14:31:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resubmit_int_urb [2021-11-19 14:31:22,773 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resubmit_int_urb [2021-11-19 14:31:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_control [2021-11-19 14:31:22,773 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_control [2021-11-19 14:31:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-19 14:31:22,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-19 14:31:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_device_lock_of_kaweth_device [2021-11-19 14:31:22,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_device_lock_of_kaweth_device [2021-11-19 14:31:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2021-11-19 14:31:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_kill_urbs [2021-11-19 14:31:22,774 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_kill_urbs [2021-11-19 14:31:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_3_4 [2021-11-19 14:31:22,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_3_4 [2021-11-19 14:31:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_disconnect [2021-11-19 14:31:22,774 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_disconnect [2021-11-19 14:31:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-19 14:31:22,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-19 14:31:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure preempt_count [2021-11-19 14:31:22,774 INFO L138 BoogieDeclarations]: Found implementation of procedure preempt_count [2021-11-19 14:31:23,668 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:31:23,674 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:31:26,242 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 14:32:22,193 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-19 14:32:22,267 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:32:22,296 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:32:22,296 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:32:22,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:32:22 BoogieIcfgContainer [2021-11-19 14:32:22,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:32:22,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:32:22,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:32:22,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:32:22,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:31:17" (1/3) ... [2021-11-19 14:32:22,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5e4059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:32:22, skipping insertion in model container [2021-11-19 14:32:22,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:21" (2/3) ... [2021-11-19 14:32:22,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5e4059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:32:22, skipping insertion in model container [2021-11-19 14:32:22,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:32:22" (3/3) ... [2021-11-19 14:32:22,311 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-19 14:32:22,317 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:32:22,318 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:32:22,388 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:32:22,396 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 [2021-11-19 14:32:22,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:32:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 1093 states, 752 states have (on average 1.2433510638297873) internal successors, (935), 757 states have internal predecessors, (935), 280 states have call successors, (280), 61 states have call predecessors, (280), 60 states have return successors, (274), 273 states have call predecessors, (274), 274 states have call successors, (274) [2021-11-19 14:32:22,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-19 14:32:22,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:22,479 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:22,480 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:22,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1127043965, now seen corresponding path program 1 times [2021-11-19 14:32:22,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:22,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720522723] [2021-11-19 14:32:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:22,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:22,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:22,515 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:22,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:32:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:24,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 2500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:32:24,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-11-19 14:32:25,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-19 14:32:26,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:26,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720522723] [2021-11-19 14:32:26,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720522723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:26,086 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:26,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:32:26,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762622534] [2021-11-19 14:32:26,090 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:26,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:32:26,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:26,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:32:26,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:32:26,152 INFO L87 Difference]: Start difference. First operand has 1093 states, 752 states have (on average 1.2433510638297873) internal successors, (935), 757 states have internal predecessors, (935), 280 states have call successors, (280), 61 states have call predecessors, (280), 60 states have return successors, (274), 273 states have call predecessors, (274), 274 states have call successors, (274) Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 4 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:32:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:30,146 INFO L93 Difference]: Finished difference Result 3294 states and 4529 transitions. [2021-11-19 14:32:30,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:32:30,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 4 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 155 [2021-11-19 14:32:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:30,195 INFO L225 Difference]: With dead ends: 3294 [2021-11-19 14:32:30,196 INFO L226 Difference]: Without dead ends: 2106 [2021-11-19 14:32:30,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:32:30,218 INFO L933 BasicCegarLoop]: 1757 mSDtfsCounter, 2080 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2080 SdHoareTripleChecker+Valid, 3700 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:30,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2080 Valid, 3700 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-19 14:32:30,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-11-19 14:32:30,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2098. [2021-11-19 14:32:30,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 1511 states have (on average 1.2455327597617472) internal successors, (1882), 1523 states have internal predecessors, (1882), 450 states have call successors, (450), 136 states have call predecessors, (450), 136 states have return successors, (450), 445 states have call predecessors, (450), 450 states have call successors, (450) [2021-11-19 14:32:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2782 transitions. [2021-11-19 14:32:30,477 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2782 transitions. Word has length 155 [2021-11-19 14:32:30,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:30,479 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 2782 transitions. [2021-11-19 14:32:30,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 4 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:32:30,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2782 transitions. [2021-11-19 14:32:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-19 14:32:30,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:30,493 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:30,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:30,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:30,719 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:30,720 INFO L85 PathProgramCache]: Analyzing trace with hash 684871418, now seen corresponding path program 1 times [2021-11-19 14:32:30,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:30,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812533736] [2021-11-19 14:32:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:30,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:30,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:30,726 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:30,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:32:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:32,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 2489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:32:32,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-11-19 14:32:33,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-19 14:32:33,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:33,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812533736] [2021-11-19 14:32:33,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812533736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:33,698 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:33,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:32:33,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947214875] [2021-11-19 14:32:33,699 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:33,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:32:33,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:33,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:32:33,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:32:33,702 INFO L87 Difference]: Start difference. First operand 2098 states and 2782 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-19 14:32:34,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:34,383 INFO L93 Difference]: Finished difference Result 5587 states and 7418 transitions. [2021-11-19 14:32:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:32:34,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 178 [2021-11-19 14:32:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:34,425 INFO L225 Difference]: With dead ends: 5587 [2021-11-19 14:32:34,425 INFO L226 Difference]: Without dead ends: 3510 [2021-11-19 14:32:34,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:32:34,439 INFO L933 BasicCegarLoop]: 1633 mSDtfsCounter, 1156 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 2981 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:34,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1156 Valid, 2981 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:32:34,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2021-11-19 14:32:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 3506. [2021-11-19 14:32:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 2515 states have (on average 1.2421471172962226) internal successors, (3124), 2534 states have internal predecessors, (3124), 760 states have call successors, (760), 230 states have call predecessors, (760), 230 states have return successors, (763), 748 states have call predecessors, (763), 760 states have call successors, (763) [2021-11-19 14:32:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 4647 transitions. [2021-11-19 14:32:34,705 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 4647 transitions. Word has length 178 [2021-11-19 14:32:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:34,708 INFO L470 AbstractCegarLoop]: Abstraction has 3506 states and 4647 transitions. [2021-11-19 14:32:34,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-19 14:32:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 4647 transitions. [2021-11-19 14:32:34,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 14:32:34,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:34,719 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:34,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:34,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:34,943 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:34,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:34,943 INFO L85 PathProgramCache]: Analyzing trace with hash 220309175, now seen corresponding path program 1 times [2021-11-19 14:32:34,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:34,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484719924] [2021-11-19 14:32:34,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:34,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:34,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:34,951 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:34,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:32:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:36,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 2538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:32:36,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-11-19 14:32:37,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-11-19 14:32:37,946 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:37,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484719924] [2021-11-19 14:32:37,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484719924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:37,946 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:37,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:32:37,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228901159] [2021-11-19 14:32:37,947 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:37,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:32:37,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:38,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:32:38,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:32:38,036 INFO L87 Difference]: Start difference. First operand 3506 states and 4647 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:32:41,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:41,648 INFO L93 Difference]: Finished difference Result 13877 states and 18387 transitions. [2021-11-19 14:32:41,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:32:41,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 179 [2021-11-19 14:32:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:41,771 INFO L225 Difference]: With dead ends: 13877 [2021-11-19 14:32:41,771 INFO L226 Difference]: Without dead ends: 10392 [2021-11-19 14:32:41,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:32:41,803 INFO L933 BasicCegarLoop]: 2714 mSDtfsCounter, 2737 mSDsluCounter, 2623 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2737 SdHoareTripleChecker+Valid, 5337 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:41,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2737 Valid, 5337 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 14:32:41,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10392 states. [2021-11-19 14:32:42,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10392 to 10376. [2021-11-19 14:32:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10376 states, 7445 states have (on average 1.241370047011417) internal successors, (9242), 7498 states have internal predecessors, (9242), 2240 states have call successors, (2240), 690 states have call predecessors, (2240), 690 states have return successors, (2249), 2208 states have call predecessors, (2249), 2240 states have call successors, (2249) [2021-11-19 14:32:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10376 states to 10376 states and 13731 transitions. [2021-11-19 14:32:42,700 INFO L78 Accepts]: Start accepts. Automaton has 10376 states and 13731 transitions. Word has length 179 [2021-11-19 14:32:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:42,701 INFO L470 AbstractCegarLoop]: Abstraction has 10376 states and 13731 transitions. [2021-11-19 14:32:42,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:32:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 10376 states and 13731 transitions. [2021-11-19 14:32:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-19 14:32:42,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:42,712 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 8, 8, 8, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:42,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:42,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:42,939 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:42,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:42,940 INFO L85 PathProgramCache]: Analyzing trace with hash 417858523, now seen corresponding path program 1 times [2021-11-19 14:32:42,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:42,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227668501] [2021-11-19 14:32:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:42,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:42,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:42,949 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:42,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:32:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:44,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 2681 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:32:44,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2021-11-19 14:32:45,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-11-19 14:32:46,170 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:46,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227668501] [2021-11-19 14:32:46,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227668501] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:46,171 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:46,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:32:46,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088688384] [2021-11-19 14:32:46,172 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:46,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:32:46,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:46,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:32:46,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:32:46,189 INFO L87 Difference]: Start difference. First operand 10376 states and 13731 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-19 14:32:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:49,996 INFO L93 Difference]: Finished difference Result 26524 states and 34820 transitions. [2021-11-19 14:32:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:32:50,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 244 [2021-11-19 14:32:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:50,170 INFO L225 Difference]: With dead ends: 26524 [2021-11-19 14:32:50,170 INFO L226 Difference]: Without dead ends: 16169 [2021-11-19 14:32:50,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:32:50,231 INFO L933 BasicCegarLoop]: 2072 mSDtfsCounter, 2403 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2403 SdHoareTripleChecker+Valid, 3485 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:50,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2403 Valid, 3485 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 14:32:50,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16169 states. [2021-11-19 14:32:51,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16169 to 16157. [2021-11-19 14:32:51,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16157 states, 11670 states have (on average 1.2417309340188518) internal successors, (14491), 11751 states have internal predecessors, (14491), 3274 states have call successors, (3274), 1212 states have call predecessors, (3274), 1212 states have return successors, (3283), 3226 states have call predecessors, (3283), 3274 states have call successors, (3283) [2021-11-19 14:32:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16157 states to 16157 states and 21048 transitions. [2021-11-19 14:32:51,392 INFO L78 Accepts]: Start accepts. Automaton has 16157 states and 21048 transitions. Word has length 244 [2021-11-19 14:32:51,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:51,394 INFO L470 AbstractCegarLoop]: Abstraction has 16157 states and 21048 transitions. [2021-11-19 14:32:51,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-19 14:32:51,395 INFO L276 IsEmpty]: Start isEmpty. Operand 16157 states and 21048 transitions. [2021-11-19 14:32:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-11-19 14:32:51,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:51,408 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:51,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:51,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:51,623 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:51,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:51,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1412042382, now seen corresponding path program 1 times [2021-11-19 14:32:51,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:51,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832690166] [2021-11-19 14:32:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:51,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:51,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:51,630 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:51,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:32:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:54,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 3032 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:32:54,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 859 trivial. 0 not checked. [2021-11-19 14:32:55,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2021-11-19 14:32:56,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:56,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832690166] [2021-11-19 14:32:56,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832690166] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:56,700 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:56,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:32:56,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755875039] [2021-11-19 14:32:56,701 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:56,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:32:56,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:56,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:32:56,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:32:56,703 INFO L87 Difference]: Start difference. First operand 16157 states and 21048 transitions. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-19 14:33:00,534 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:01,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:01,796 INFO L93 Difference]: Finished difference Result 41959 states and 55795 transitions. [2021-11-19 14:33:01,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:33:01,798 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 363 [2021-11-19 14:33:01,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:01,942 INFO L225 Difference]: With dead ends: 41959 [2021-11-19 14:33:01,943 INFO L226 Difference]: Without dead ends: 25823 [2021-11-19 14:33:02,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:33:02,008 INFO L933 BasicCegarLoop]: 1823 mSDtfsCounter, 1961 mSDsluCounter, 5203 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2031 SdHoareTripleChecker+Valid, 7026 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:02,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2031 Valid, 7026 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 14:33:02,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25823 states. [2021-11-19 14:33:03,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25823 to 16175. [2021-11-19 14:33:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16175 states, 11688 states have (on average 1.2413586584531142) internal successors, (14509), 11769 states have internal predecessors, (14509), 3274 states have call successors, (3274), 1212 states have call predecessors, (3274), 1212 states have return successors, (3283), 3226 states have call predecessors, (3283), 3274 states have call successors, (3283) [2021-11-19 14:33:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16175 states to 16175 states and 21066 transitions. [2021-11-19 14:33:03,628 INFO L78 Accepts]: Start accepts. Automaton has 16175 states and 21066 transitions. Word has length 363 [2021-11-19 14:33:03,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:03,629 INFO L470 AbstractCegarLoop]: Abstraction has 16175 states and 21066 transitions. [2021-11-19 14:33:03,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-19 14:33:03,630 INFO L276 IsEmpty]: Start isEmpty. Operand 16175 states and 21066 transitions. [2021-11-19 14:33:03,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-11-19 14:33:03,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:03,644 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:03,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:03,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:33:03,859 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:03,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:03,859 INFO L85 PathProgramCache]: Analyzing trace with hash -528133826, now seen corresponding path program 1 times [2021-11-19 14:33:03,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:03,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323378096] [2021-11-19 14:33:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:03,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:03,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:03,866 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:03,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:33:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:07,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 3079 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:33:07,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:33:07,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:33:08,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:08,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323378096] [2021-11-19 14:33:08,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323378096] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:08,736 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:33:08,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:33:08,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641425203] [2021-11-19 14:33:08,737 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:08,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:33:08,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:08,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:33:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:33:08,739 INFO L87 Difference]: Start difference. First operand 16175 states and 21066 transitions. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:33:10,617 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:12,291 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:14,392 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:15,452 INFO L93 Difference]: Finished difference Result 32365 states and 42151 transitions. [2021-11-19 14:33:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:33:15,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 384 [2021-11-19 14:33:15,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:15,561 INFO L225 Difference]: With dead ends: 32365 [2021-11-19 14:33:15,561 INFO L226 Difference]: Without dead ends: 16211 [2021-11-19 14:33:15,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 762 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:33:15,605 INFO L933 BasicCegarLoop]: 1408 mSDtfsCounter, 12 mSDsluCounter, 2814 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 4222 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:15,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 4222 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2021-11-19 14:33:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16211 states. [2021-11-19 14:33:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16211 to 16211. [2021-11-19 14:33:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16211 states, 11724 states have (on average 1.240617536676902) internal successors, (14545), 11805 states have internal predecessors, (14545), 3274 states have call successors, (3274), 1212 states have call predecessors, (3274), 1212 states have return successors, (3283), 3226 states have call predecessors, (3283), 3274 states have call successors, (3283) [2021-11-19 14:33:16,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16211 states to 16211 states and 21102 transitions. [2021-11-19 14:33:16,995 INFO L78 Accepts]: Start accepts. Automaton has 16211 states and 21102 transitions. Word has length 384 [2021-11-19 14:33:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:17,002 INFO L470 AbstractCegarLoop]: Abstraction has 16211 states and 21102 transitions. [2021-11-19 14:33:17,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:33:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 16211 states and 21102 transitions. [2021-11-19 14:33:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-19 14:33:17,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:17,018 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:17,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-19 14:33:17,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:33:17,232 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:17,233 INFO L85 PathProgramCache]: Analyzing trace with hash 78436980, now seen corresponding path program 1 times [2021-11-19 14:33:17,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:17,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498215643] [2021-11-19 14:33:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:17,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:17,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:17,238 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:17,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:33:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:20,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 3091 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:33:20,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:33:21,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:33:22,089 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:22,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498215643] [2021-11-19 14:33:22,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498215643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:22,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1535698989] [2021-11-19 14:33:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:22,091 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:33:22,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:33:22,096 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:33:22,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 14:33:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:23,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 3091 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:33:23,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:33:26,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:33:28,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1535698989] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:28,047 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:33:28,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-19 14:33:28,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483202709] [2021-11-19 14:33:28,048 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:28,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:33:28,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:28,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:33:28,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:33:28,050 INFO L87 Difference]: Start difference. First operand 16211 states and 21102 transitions. Second operand has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:33:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:31,375 INFO L93 Difference]: Finished difference Result 32401 states and 42634 transitions. [2021-11-19 14:33:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:33:31,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) Word has length 392 [2021-11-19 14:33:31,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:31,467 INFO L225 Difference]: With dead ends: 32401 [2021-11-19 14:33:31,467 INFO L226 Difference]: Without dead ends: 16211 [2021-11-19 14:33:31,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1564 GetRequests, 1553 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:33:31,522 INFO L933 BasicCegarLoop]: 1408 mSDtfsCounter, 1223 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 2309 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:31,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 2309 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 14:33:31,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16211 states. [2021-11-19 14:33:32,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16211 to 16211. [2021-11-19 14:33:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16211 states, 11724 states have (on average 1.23805868304333) internal successors, (14515), 11805 states have internal predecessors, (14515), 3274 states have call successors, (3274), 1212 states have call predecessors, (3274), 1212 states have return successors, (3283), 3226 states have call predecessors, (3283), 3274 states have call successors, (3283) [2021-11-19 14:33:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16211 states to 16211 states and 21072 transitions. [2021-11-19 14:33:32,980 INFO L78 Accepts]: Start accepts. Automaton has 16211 states and 21072 transitions. Word has length 392 [2021-11-19 14:33:32,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:32,982 INFO L470 AbstractCegarLoop]: Abstraction has 16211 states and 21072 transitions. [2021-11-19 14:33:32,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:33:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 16211 states and 21072 transitions. [2021-11-19 14:33:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-11-19 14:33:33,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:33,005 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:33,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:33,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:33,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:33:33,418 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:33,419 INFO L85 PathProgramCache]: Analyzing trace with hash 372836895, now seen corresponding path program 1 times [2021-11-19 14:33:33,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:33,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776283211] [2021-11-19 14:33:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:33,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:33,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:33,427 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:33,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:33:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:36,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 3092 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:33:36,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:33:37,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:33:38,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:38,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776283211] [2021-11-19 14:33:38,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776283211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:38,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1426861025] [2021-11-19 14:33:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:38,727 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:33:38,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:33:38,959 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:33:38,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 14:33:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:40,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 3092 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:33:40,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:33:43,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:33:44,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1426861025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:44,819 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:33:44,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-19 14:33:44,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377430415] [2021-11-19 14:33:44,820 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:44,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:33:44,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:44,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:33:44,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:33:44,822 INFO L87 Difference]: Start difference. First operand 16211 states and 21072 transitions. Second operand has 5 states, 5 states have (on average 56.2) internal successors, (281), 5 states have internal predecessors, (281), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:33:47,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:47,947 INFO L93 Difference]: Finished difference Result 32401 states and 42574 transitions. [2021-11-19 14:33:47,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:33:47,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 56.2) internal successors, (281), 5 states have internal predecessors, (281), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) Word has length 393 [2021-11-19 14:33:47,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:48,032 INFO L225 Difference]: With dead ends: 32401 [2021-11-19 14:33:48,032 INFO L226 Difference]: Without dead ends: 16211 [2021-11-19 14:33:48,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1557 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:33:48,080 INFO L933 BasicCegarLoop]: 1407 mSDtfsCounter, 1222 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 2307 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:48,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1222 Valid, 2307 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 14:33:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16211 states. [2021-11-19 14:33:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16211 to 16211. [2021-11-19 14:33:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16211 states, 11724 states have (on average 1.2354998294097577) internal successors, (14485), 11805 states have internal predecessors, (14485), 3274 states have call successors, (3274), 1212 states have call predecessors, (3274), 1212 states have return successors, (3283), 3226 states have call predecessors, (3283), 3274 states have call successors, (3283) [2021-11-19 14:33:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16211 states to 16211 states and 21042 transitions. [2021-11-19 14:33:49,428 INFO L78 Accepts]: Start accepts. Automaton has 16211 states and 21042 transitions. Word has length 393 [2021-11-19 14:33:49,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:49,431 INFO L470 AbstractCegarLoop]: Abstraction has 16211 states and 21042 transitions. [2021-11-19 14:33:49,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.2) internal successors, (281), 5 states have internal predecessors, (281), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:33:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 16211 states and 21042 transitions. [2021-11-19 14:33:49,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-11-19 14:33:49,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:49,442 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:49,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:49,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:49,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:33:49,866 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:49,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:49,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1023816272, now seen corresponding path program 1 times [2021-11-19 14:33:49,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:49,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195402177] [2021-11-19 14:33:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:49,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:49,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:49,873 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:50,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:33:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:53,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 3093 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:33:53,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:33:53,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:33:54,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:54,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195402177] [2021-11-19 14:33:54,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195402177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:54,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1585769730] [2021-11-19 14:33:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:54,739 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:33:54,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:33:54,740 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:33:54,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:33:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:56,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 3093 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:33:56,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:33:58,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:34:00,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1585769730] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:00,381 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:34:00,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-19 14:34:00,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37735461] [2021-11-19 14:34:00,383 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:00,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:34:00,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:00,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:34:00,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:00,386 INFO L87 Difference]: Start difference. First operand 16211 states and 21042 transitions. Second operand has 5 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:34:03,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:03,999 INFO L93 Difference]: Finished difference Result 32401 states and 42514 transitions. [2021-11-19 14:34:03,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:34:04,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) Word has length 394 [2021-11-19 14:34:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:04,099 INFO L225 Difference]: With dead ends: 32401 [2021-11-19 14:34:04,100 INFO L226 Difference]: Without dead ends: 16211 [2021-11-19 14:34:04,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1572 GetRequests, 1561 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:04,160 INFO L933 BasicCegarLoop]: 1406 mSDtfsCounter, 1984 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1984 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:04,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1984 Valid, 2305 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 14:34:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16211 states. [2021-11-19 14:34:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16211 to 16211. [2021-11-19 14:34:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16211 states, 11724 states have (on average 1.2329409757761856) internal successors, (14455), 11805 states have internal predecessors, (14455), 3274 states have call successors, (3274), 1212 states have call predecessors, (3274), 1212 states have return successors, (3283), 3226 states have call predecessors, (3283), 3274 states have call successors, (3283) [2021-11-19 14:34:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16211 states to 16211 states and 21012 transitions. [2021-11-19 14:34:05,886 INFO L78 Accepts]: Start accepts. Automaton has 16211 states and 21012 transitions. Word has length 394 [2021-11-19 14:34:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:05,887 INFO L470 AbstractCegarLoop]: Abstraction has 16211 states and 21012 transitions. [2021-11-19 14:34:05,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:34:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 16211 states and 21012 transitions. [2021-11-19 14:34:05,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-11-19 14:34:05,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:05,898 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:05,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:06,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:06,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:06,315 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:06,316 INFO L85 PathProgramCache]: Analyzing trace with hash -156142917, now seen corresponding path program 1 times [2021-11-19 14:34:06,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:06,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685872075] [2021-11-19 14:34:06,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:06,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:06,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:06,321 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:06,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:34:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:09,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 3094 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:34:09,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:34:10,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:34:11,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:11,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685872075] [2021-11-19 14:34:11,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685872075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:11,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1009711641] [2021-11-19 14:34:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:11,311 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:11,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:34:11,325 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:34:11,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 14:34:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:13,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 3094 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:34:13,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:34:15,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:34:17,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1009711641] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:17,207 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:34:17,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-19 14:34:17,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413142240] [2021-11-19 14:34:17,208 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:17,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:34:17,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:34:17,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:17,211 INFO L87 Difference]: Start difference. First operand 16211 states and 21012 transitions. Second operand has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:34:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:21,202 INFO L93 Difference]: Finished difference Result 33836 states and 44003 transitions. [2021-11-19 14:34:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:21,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) Word has length 395 [2021-11-19 14:34:21,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:21,265 INFO L225 Difference]: With dead ends: 33836 [2021-11-19 14:34:21,265 INFO L226 Difference]: Without dead ends: 17646 [2021-11-19 14:34:21,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1576 GetRequests, 1565 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:21,309 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 1412 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 2819 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:21,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 2819 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 14:34:21,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17646 states. [2021-11-19 14:34:22,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17646 to 17644. [2021-11-19 14:34:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17644 states, 12717 states have (on average 1.2209640638515373) internal successors, (15527), 12798 states have internal predecessors, (15527), 3476 states have call successors, (3476), 1450 states have call predecessors, (3476), 1450 states have return successors, (3485), 3428 states have call predecessors, (3485), 3476 states have call successors, (3485) [2021-11-19 14:34:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17644 states to 17644 states and 22488 transitions. [2021-11-19 14:34:22,692 INFO L78 Accepts]: Start accepts. Automaton has 17644 states and 22488 transitions. Word has length 395 [2021-11-19 14:34:22,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:22,693 INFO L470 AbstractCegarLoop]: Abstraction has 17644 states and 22488 transitions. [2021-11-19 14:34:22,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:34:22,694 INFO L276 IsEmpty]: Start isEmpty. Operand 17644 states and 22488 transitions. [2021-11-19 14:34:22,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-11-19 14:34:22,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:22,704 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:22,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-19 14:34:22,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:23,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:23,120 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:23,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:23,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2034344492, now seen corresponding path program 1 times [2021-11-19 14:34:23,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:23,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241815859] [2021-11-19 14:34:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:23,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:23,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:23,127 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:23,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:34:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:26,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 3095 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:34:26,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:34:27,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:34:28,163 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:28,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241815859] [2021-11-19 14:34:28,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241815859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:28,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [948597992] [2021-11-19 14:34:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:28,164 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:28,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:34:28,165 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:34:28,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:34:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:30,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 3095 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:30,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:34:32,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:34:34,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [948597992] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:34,372 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:34:34,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-19 14:34:34,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832295227] [2021-11-19 14:34:34,373 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:34,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:34:34,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:34,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:34:34,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:34,375 INFO L87 Difference]: Start difference. First operand 17644 states and 22488 transitions. Second operand has 5 states, 5 states have (on average 57.4) internal successors, (287), 5 states have internal predecessors, (287), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:34:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:38,404 INFO L93 Difference]: Finished difference Result 35256 states and 45304 transitions. [2021-11-19 14:34:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:34:38,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 57.4) internal successors, (287), 5 states have internal predecessors, (287), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) Word has length 396 [2021-11-19 14:34:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:38,479 INFO L225 Difference]: With dead ends: 35256 [2021-11-19 14:34:38,479 INFO L226 Difference]: Without dead ends: 17644 [2021-11-19 14:34:38,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1580 GetRequests, 1569 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:38,533 INFO L933 BasicCegarLoop]: 1405 mSDtfsCounter, 1980 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1980 SdHoareTripleChecker+Valid, 2303 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:38,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1980 Valid, 2303 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 14:34:38,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17644 states. [2021-11-19 14:34:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17644 to 17644. [2021-11-19 14:34:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17644 states, 12717 states have (on average 1.2190768262955098) internal successors, (15503), 12798 states have internal predecessors, (15503), 3476 states have call successors, (3476), 1450 states have call predecessors, (3476), 1450 states have return successors, (3485), 3428 states have call predecessors, (3485), 3476 states have call successors, (3485) [2021-11-19 14:34:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17644 states to 17644 states and 22464 transitions. [2021-11-19 14:34:40,048 INFO L78 Accepts]: Start accepts. Automaton has 17644 states and 22464 transitions. Word has length 396 [2021-11-19 14:34:40,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:40,049 INFO L470 AbstractCegarLoop]: Abstraction has 17644 states and 22464 transitions. [2021-11-19 14:34:40,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.4) internal successors, (287), 5 states have internal predecessors, (287), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:34:40,050 INFO L276 IsEmpty]: Start isEmpty. Operand 17644 states and 22464 transitions. [2021-11-19 14:34:40,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-11-19 14:34:40,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:40,060 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:40,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:40,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 14:34:40,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:40,479 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:40,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:40,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1334494039, now seen corresponding path program 1 times [2021-11-19 14:34:40,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:40,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603178205] [2021-11-19 14:34:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:40,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:40,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:40,486 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:40,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:34:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:43,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 3096 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:34:43,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:34:44,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:34:45,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:45,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603178205] [2021-11-19 14:34:45,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603178205] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:45,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2110247801] [2021-11-19 14:34:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:45,632 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:45,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:34:45,632 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:34:45,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 14:34:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:47,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 3096 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:47,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:34:49,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:34:51,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2110247801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:51,564 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:34:51,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-19 14:34:51,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421481852] [2021-11-19 14:34:51,565 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:51,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:34:51,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:51,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:34:51,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:51,568 INFO L87 Difference]: Start difference. First operand 17644 states and 22464 transitions. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:34:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:55,130 INFO L93 Difference]: Finished difference Result 35256 states and 45256 transitions. [2021-11-19 14:34:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:34:55,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) Word has length 397 [2021-11-19 14:34:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:55,183 INFO L225 Difference]: With dead ends: 35256 [2021-11-19 14:34:55,183 INFO L226 Difference]: Without dead ends: 17644 [2021-11-19 14:34:55,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1573 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:55,222 INFO L933 BasicCegarLoop]: 1404 mSDtfsCounter, 1219 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 2301 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:55,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1219 Valid, 2301 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 14:34:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17644 states. [2021-11-19 14:34:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17644 to 17644. [2021-11-19 14:34:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17644 states, 12717 states have (on average 1.2171895887394826) internal successors, (15479), 12798 states have internal predecessors, (15479), 3476 states have call successors, (3476), 1450 states have call predecessors, (3476), 1450 states have return successors, (3485), 3428 states have call predecessors, (3485), 3476 states have call successors, (3485) [2021-11-19 14:34:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17644 states to 17644 states and 22440 transitions. [2021-11-19 14:34:56,657 INFO L78 Accepts]: Start accepts. Automaton has 17644 states and 22440 transitions. Word has length 397 [2021-11-19 14:34:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:56,658 INFO L470 AbstractCegarLoop]: Abstraction has 17644 states and 22440 transitions. [2021-11-19 14:34:56,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:34:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 17644 states and 22440 transitions. [2021-11-19 14:34:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-11-19 14:34:56,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:56,668 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:56,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-19 14:34:56,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:57,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:57,091 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:57,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:57,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1228483080, now seen corresponding path program 1 times [2021-11-19 14:34:57,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:57,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979781992] [2021-11-19 14:34:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:57,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:57,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:57,096 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:57,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:35:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:00,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 3097 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:35:00,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:35:01,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:35:02,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:02,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979781992] [2021-11-19 14:35:02,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979781992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:35:02,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [34780744] [2021-11-19 14:35:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:02,258 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:35:02,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:35:02,259 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:35:02,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:35:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:04,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 3097 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:35:04,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:35:06,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:35:08,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [34780744] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:08,435 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:35:08,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-19 14:35:08,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666303355] [2021-11-19 14:35:08,436 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:08,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:35:08,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:08,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:35:08,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:35:08,439 INFO L87 Difference]: Start difference. First operand 17644 states and 22440 transitions. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:35:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:12,403 INFO L93 Difference]: Finished difference Result 35256 states and 45208 transitions. [2021-11-19 14:35:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:35:12,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) Word has length 398 [2021-11-19 14:35:12,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:12,467 INFO L225 Difference]: With dead ends: 35256 [2021-11-19 14:35:12,467 INFO L226 Difference]: Without dead ends: 17644 [2021-11-19 14:35:12,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1588 GetRequests, 1577 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:35:12,502 INFO L933 BasicCegarLoop]: 1403 mSDtfsCounter, 1218 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:12,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 2299 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 14:35:12,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17644 states. [2021-11-19 14:35:13,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17644 to 17644. [2021-11-19 14:35:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17644 states, 12717 states have (on average 1.2153023511834553) internal successors, (15455), 12798 states have internal predecessors, (15455), 3476 states have call successors, (3476), 1450 states have call predecessors, (3476), 1450 states have return successors, (3485), 3428 states have call predecessors, (3485), 3476 states have call successors, (3485) [2021-11-19 14:35:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17644 states to 17644 states and 22416 transitions. [2021-11-19 14:35:13,850 INFO L78 Accepts]: Start accepts. Automaton has 17644 states and 22416 transitions. Word has length 398 [2021-11-19 14:35:13,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:13,851 INFO L470 AbstractCegarLoop]: Abstraction has 17644 states and 22416 transitions. [2021-11-19 14:35:13,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:35:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 17644 states and 22416 transitions. [2021-11-19 14:35:13,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-11-19 14:35:13,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:13,858 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:13,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:14,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:14,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:35:14,259 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:14,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1943340045, now seen corresponding path program 1 times [2021-11-19 14:35:14,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:14,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453586586] [2021-11-19 14:35:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:14,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:14,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:14,266 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:14,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:35:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:17,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 3098 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:35:17,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:35:18,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:35:18,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:18,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453586586] [2021-11-19 14:35:18,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453586586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:35:18,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1369135323] [2021-11-19 14:35:18,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:18,982 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:35:18,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:35:18,984 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:35:18,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 14:35:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:20,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 3098 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:35:20,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:35:22,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:35:24,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1369135323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:24,474 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:35:24,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-19 14:35:24,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901944421] [2021-11-19 14:35:24,474 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:24,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:35:24,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:24,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:35:24,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:35:24,477 INFO L87 Difference]: Start difference. First operand 17644 states and 22416 transitions. Second operand has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:35:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:28,242 INFO L93 Difference]: Finished difference Result 35256 states and 45160 transitions. [2021-11-19 14:35:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:35:28,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) Word has length 399 [2021-11-19 14:35:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:28,295 INFO L225 Difference]: With dead ends: 35256 [2021-11-19 14:35:28,295 INFO L226 Difference]: Without dead ends: 17644 [2021-11-19 14:35:28,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1592 GetRequests, 1581 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:35:28,333 INFO L933 BasicCegarLoop]: 1402 mSDtfsCounter, 1971 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1971 SdHoareTripleChecker+Valid, 2297 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:28,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1971 Valid, 2297 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 14:35:28,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17644 states. [2021-11-19 14:35:29,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17644 to 17644. [2021-11-19 14:35:29,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17644 states, 12717 states have (on average 1.2134151136274278) internal successors, (15431), 12798 states have internal predecessors, (15431), 3476 states have call successors, (3476), 1450 states have call predecessors, (3476), 1450 states have return successors, (3485), 3428 states have call predecessors, (3485), 3476 states have call successors, (3485) [2021-11-19 14:35:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17644 states to 17644 states and 22392 transitions. [2021-11-19 14:35:29,782 INFO L78 Accepts]: Start accepts. Automaton has 17644 states and 22392 transitions. Word has length 399 [2021-11-19 14:35:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:29,783 INFO L470 AbstractCegarLoop]: Abstraction has 17644 states and 22392 transitions. [2021-11-19 14:35:29,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:35:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 17644 states and 22392 transitions. [2021-11-19 14:35:29,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-11-19 14:35:29,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:29,790 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:29,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:30,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:30,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:35:30,194 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:30,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:30,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1371092508, now seen corresponding path program 1 times [2021-11-19 14:35:30,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:30,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344707660] [2021-11-19 14:35:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:30,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:30,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:30,199 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:30,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:35:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:33,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 3099 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:35:33,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:35:33,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:35:34,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:34,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [344707660] [2021-11-19 14:35:34,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [344707660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:35:34,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [665265574] [2021-11-19 14:35:34,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:34,874 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:35:34,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:35:34,875 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:35:34,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-19 14:35:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:36,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 3099 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:35:36,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:35:38,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:35:40,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [665265574] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:40,384 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:35:40,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-19 14:35:40,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095731007] [2021-11-19 14:35:40,385 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:40,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:35:40,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:40,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:35:40,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:35:40,387 INFO L87 Difference]: Start difference. First operand 17644 states and 22392 transitions. Second operand has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:35:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:44,023 INFO L93 Difference]: Finished difference Result 35256 states and 45112 transitions. [2021-11-19 14:35:44,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:35:44,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) Word has length 400 [2021-11-19 14:35:44,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:44,095 INFO L225 Difference]: With dead ends: 35256 [2021-11-19 14:35:44,095 INFO L226 Difference]: Without dead ends: 17644 [2021-11-19 14:35:44,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1596 GetRequests, 1585 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:35:44,146 INFO L933 BasicCegarLoop]: 1401 mSDtfsCounter, 1216 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:44,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 2295 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:35:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17644 states. [2021-11-19 14:35:45,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17644 to 17644. [2021-11-19 14:35:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17644 states, 12717 states have (on average 1.2115278760714006) internal successors, (15407), 12798 states have internal predecessors, (15407), 3476 states have call successors, (3476), 1450 states have call predecessors, (3476), 1450 states have return successors, (3485), 3428 states have call predecessors, (3485), 3476 states have call successors, (3485) [2021-11-19 14:35:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17644 states to 17644 states and 22368 transitions. [2021-11-19 14:35:46,047 INFO L78 Accepts]: Start accepts. Automaton has 17644 states and 22368 transitions. Word has length 400 [2021-11-19 14:35:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:46,048 INFO L470 AbstractCegarLoop]: Abstraction has 17644 states and 22368 transitions. [2021-11-19 14:35:46,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:35:46,049 INFO L276 IsEmpty]: Start isEmpty. Operand 17644 states and 22368 transitions. [2021-11-19 14:35:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2021-11-19 14:35:46,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:46,055 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:46,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:46,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:46,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:46,456 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:46,457 INFO L85 PathProgramCache]: Analyzing trace with hash -696771441, now seen corresponding path program 1 times [2021-11-19 14:35:46,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:46,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212985756] [2021-11-19 14:35:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:46,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:46,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:46,462 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:46,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:35:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:49,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 3100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:35:49,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:35:50,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:35:51,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:51,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212985756] [2021-11-19 14:35:51,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212985756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:35:51,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [840442438] [2021-11-19 14:35:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:51,157 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:35:51,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:35:51,158 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:35:51,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-19 14:35:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:52,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 3100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:35:52,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:35:55,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:35:56,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [840442438] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:56,661 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:35:56,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-19 14:35:56,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571175931] [2021-11-19 14:35:56,662 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:56,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:35:56,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:56,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:35:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:35:56,664 INFO L87 Difference]: Start difference. First operand 17644 states and 22368 transitions. Second operand has 5 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:36:00,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:00,644 INFO L93 Difference]: Finished difference Result 35256 states and 45064 transitions. [2021-11-19 14:36:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:36:00,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) Word has length 401 [2021-11-19 14:36:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:00,717 INFO L225 Difference]: With dead ends: 35256 [2021-11-19 14:36:00,718 INFO L226 Difference]: Without dead ends: 17644 [2021-11-19 14:36:00,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1600 GetRequests, 1589 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:36:00,770 INFO L933 BasicCegarLoop]: 1400 mSDtfsCounter, 1965 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1965 SdHoareTripleChecker+Valid, 2293 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:00,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1965 Valid, 2293 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 14:36:00,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17644 states. [2021-11-19 14:36:02,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17644 to 17644. [2021-11-19 14:36:02,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17644 states, 12717 states have (on average 1.209640638515373) internal successors, (15383), 12798 states have internal predecessors, (15383), 3476 states have call successors, (3476), 1450 states have call predecessors, (3476), 1450 states have return successors, (3485), 3428 states have call predecessors, (3485), 3476 states have call successors, (3485) [2021-11-19 14:36:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17644 states to 17644 states and 22344 transitions. [2021-11-19 14:36:02,362 INFO L78 Accepts]: Start accepts. Automaton has 17644 states and 22344 transitions. Word has length 401 [2021-11-19 14:36:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:02,363 INFO L470 AbstractCegarLoop]: Abstraction has 17644 states and 22344 transitions. [2021-11-19 14:36:02,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:36:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 17644 states and 22344 transitions. [2021-11-19 14:36:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-11-19 14:36:02,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:02,370 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:02,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:02,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-19 14:36:02,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:36:02,771 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:02,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:02,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1153138240, now seen corresponding path program 1 times [2021-11-19 14:36:02,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:02,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559452777] [2021-11-19 14:36:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:02,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:02,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:02,776 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:02,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:36:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:05,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 3101 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:36:05,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:36:06,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:36:07,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:07,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559452777] [2021-11-19 14:36:07,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559452777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:36:07,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1806380681] [2021-11-19 14:36:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:07,623 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:36:07,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:36:07,624 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:36:07,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-19 14:36:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:09,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 3101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:36:09,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:36:11,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:36:13,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1806380681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:13,185 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:36:13,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-19 14:36:13,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226380900] [2021-11-19 14:36:13,186 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:13,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:36:13,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:13,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:36:13,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:36:13,188 INFO L87 Difference]: Start difference. First operand 17644 states and 22344 transitions. Second operand has 5 states, 5 states have (on average 59.8) internal successors, (299), 5 states have internal predecessors, (299), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:36:16,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:16,981 INFO L93 Difference]: Finished difference Result 35256 states and 45016 transitions. [2021-11-19 14:36:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:36:16,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 59.8) internal successors, (299), 5 states have internal predecessors, (299), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) Word has length 402 [2021-11-19 14:36:16,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:17,031 INFO L225 Difference]: With dead ends: 35256 [2021-11-19 14:36:17,031 INFO L226 Difference]: Without dead ends: 17644 [2021-11-19 14:36:17,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1604 GetRequests, 1593 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:36:17,068 INFO L933 BasicCegarLoop]: 1399 mSDtfsCounter, 1214 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 2291 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:17,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1214 Valid, 2291 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:36:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17644 states. [2021-11-19 14:36:18,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17644 to 17644. [2021-11-19 14:36:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17644 states, 12717 states have (on average 1.2077534009593458) internal successors, (15359), 12798 states have internal predecessors, (15359), 3476 states have call successors, (3476), 1450 states have call predecessors, (3476), 1450 states have return successors, (3485), 3428 states have call predecessors, (3485), 3476 states have call successors, (3485) [2021-11-19 14:36:18,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17644 states to 17644 states and 22320 transitions. [2021-11-19 14:36:18,704 INFO L78 Accepts]: Start accepts. Automaton has 17644 states and 22320 transitions. Word has length 402 [2021-11-19 14:36:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:18,705 INFO L470 AbstractCegarLoop]: Abstraction has 17644 states and 22320 transitions. [2021-11-19 14:36:18,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.8) internal successors, (299), 5 states have internal predecessors, (299), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:36:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 17644 states and 22320 transitions. [2021-11-19 14:36:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-11-19 14:36:18,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:18,718 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:18,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:18,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:19,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:36:19,143 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:19,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:19,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1993876779, now seen corresponding path program 1 times [2021-11-19 14:36:19,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:19,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875846124] [2021-11-19 14:36:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:19,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:19,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:19,151 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:19,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:36:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:22,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 3102 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:36:22,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:36:23,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:36:23,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:23,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875846124] [2021-11-19 14:36:23,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875846124] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:36:23,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [899188348] [2021-11-19 14:36:23,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:23,964 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:36:23,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:36:23,964 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:36:23,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-19 14:36:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:25,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 3102 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:36:25,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:36:27,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:36:29,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [899188348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:29,618 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:36:29,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-19 14:36:29,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424453397] [2021-11-19 14:36:29,619 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:29,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:36:29,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:29,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:36:29,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:36:29,621 INFO L87 Difference]: Start difference. First operand 17644 states and 22320 transitions. Second operand has 5 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:36:33,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:33,537 INFO L93 Difference]: Finished difference Result 35256 states and 44968 transitions. [2021-11-19 14:36:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:36:33,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) Word has length 403 [2021-11-19 14:36:33,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:33,596 INFO L225 Difference]: With dead ends: 35256 [2021-11-19 14:36:33,596 INFO L226 Difference]: Without dead ends: 17644 [2021-11-19 14:36:33,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1608 GetRequests, 1597 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:36:33,632 INFO L933 BasicCegarLoop]: 1398 mSDtfsCounter, 1213 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 2289 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:33,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1213 Valid, 2289 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:36:33,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17644 states. [2021-11-19 14:36:35,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17644 to 17644. [2021-11-19 14:36:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17644 states, 12717 states have (on average 1.2058661634033183) internal successors, (15335), 12798 states have internal predecessors, (15335), 3476 states have call successors, (3476), 1450 states have call predecessors, (3476), 1450 states have return successors, (3485), 3428 states have call predecessors, (3485), 3476 states have call successors, (3485) [2021-11-19 14:36:35,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17644 states to 17644 states and 22296 transitions. [2021-11-19 14:36:35,357 INFO L78 Accepts]: Start accepts. Automaton has 17644 states and 22296 transitions. Word has length 403 [2021-11-19 14:36:35,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:35,358 INFO L470 AbstractCegarLoop]: Abstraction has 17644 states and 22296 transitions. [2021-11-19 14:36:35,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 3 states have call successors, (76), 3 states have call predecessors, (76), 4 states have return successors, (74), 4 states have call predecessors, (74), 3 states have call successors, (74) [2021-11-19 14:36:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 17644 states and 22296 transitions. [2021-11-19 14:36:35,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-11-19 14:36:35,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:35,365 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:35,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-19 14:36:35,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:35,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:36:35,767 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:35,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:35,767 INFO L85 PathProgramCache]: Analyzing trace with hash 2022505930, now seen corresponding path program 1 times [2021-11-19 14:36:35,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:35,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011380676] [2021-11-19 14:36:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:35,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:35,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:35,772 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:35,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 14:36:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:38,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 3102 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:36:38,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:36:39,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:36:40,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:40,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011380676] [2021-11-19 14:36:40,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011380676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:36:40,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2076572908] [2021-11-19 14:36:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:40,410 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:36:40,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:36:40,412 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:36:40,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-19 14:36:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:41,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 3102 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:36:41,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 14:36:42,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-19 14:36:43,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2076572908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:36:43,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683954203] [2021-11-19 14:36:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:43,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:36:43,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:36:43,409 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:36:43,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-19 14:36:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:45,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 3102 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:36:45,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 24 proven. 76 refuted. 0 times theorem prover too weak. 927 trivial. 0 not checked. [2021-11-19 14:36:47,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-19 14:36:48,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683954203] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:36:48,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 14:36:48,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 6, 6, 8] total 17 [2021-11-19 14:36:48,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339229412] [2021-11-19 14:36:48,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:48,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:36:48,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:48,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:36:48,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:36:48,104 INFO L87 Difference]: Start difference. First operand 17644 states and 22296 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (38), 1 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 1 states have call successors, (37) [2021-11-19 14:36:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:49,915 INFO L93 Difference]: Finished difference Result 17724 states and 22561 transitions. [2021-11-19 14:36:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:36:49,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (38), 1 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 1 states have call successors, (37) Word has length 403 [2021-11-19 14:36:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:49,962 INFO L225 Difference]: With dead ends: 17724 [2021-11-19 14:36:49,962 INFO L226 Difference]: Without dead ends: 17722 [2021-11-19 14:36:49,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2412 GetRequests, 2397 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:36:49,969 INFO L933 BasicCegarLoop]: 1412 mSDtfsCounter, 3 mSDsluCounter, 4231 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5643 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:49,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 5643 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:36:49,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17722 states. [2021-11-19 14:36:52,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17722 to 17644. [2021-11-19 14:36:52,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17644 states, 12717 states have (on average 1.203978925847291) internal successors, (15311), 12798 states have internal predecessors, (15311), 3476 states have call successors, (3476), 1450 states have call predecessors, (3476), 1450 states have return successors, (3485), 3428 states have call predecessors, (3485), 3476 states have call successors, (3485) [2021-11-19 14:36:52,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17644 states to 17644 states and 22272 transitions. [2021-11-19 14:36:52,101 INFO L78 Accepts]: Start accepts. Automaton has 17644 states and 22272 transitions. Word has length 403 [2021-11-19 14:36:52,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:52,101 INFO L470 AbstractCegarLoop]: Abstraction has 17644 states and 22272 transitions. [2021-11-19 14:36:52,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (38), 1 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 1 states have call successors, (37) [2021-11-19 14:36:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 17644 states and 22272 transitions. [2021-11-19 14:36:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2021-11-19 14:36:52,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:52,149 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 21, 21, 21, 14, 14, 14, 14, 14, 14, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:52,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-19 14:36:52,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-19 14:36:52,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:52,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:36:52,771 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:52,772 INFO L85 PathProgramCache]: Analyzing trace with hash 972469051, now seen corresponding path program 1 times [2021-11-19 14:36:52,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:52,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082017657] [2021-11-19 14:36:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:52,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:52,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:52,777 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:52,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 14:36:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:57,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 4589 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:36:57,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 1371 proven. 8 refuted. 0 times theorem prover too weak. 1911 trivial. 0 not checked. [2021-11-19 14:37:00,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 3261 trivial. 0 not checked. [2021-11-19 14:37:02,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:02,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082017657] [2021-11-19 14:37:02,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082017657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:37:02,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [802558799] [2021-11-19 14:37:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:02,522 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:37:02,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:37:02,522 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:37:02,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-19 14:37:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:04,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 4589 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:37:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 506 proven. 0 refuted. 0 times theorem prover too weak. 2784 trivial. 0 not checked. [2021-11-19 14:37:06,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3269 trivial. 0 not checked. [2021-11-19 14:37:07,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [802558799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:07,577 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:37:07,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-19 14:37:07,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682168367] [2021-11-19 14:37:07,579 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:07,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:37:07,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:07,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:37:07,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:37:07,582 INFO L87 Difference]: Start difference. First operand 17644 states and 22272 transitions. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 3 states have call successors, (111), 3 states have call predecessors, (111), 3 states have return successors, (110), 3 states have call predecessors, (110), 3 states have call successors, (110) [2021-11-19 14:37:09,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:09,912 INFO L93 Difference]: Finished difference Result 41760 states and 52837 transitions. [2021-11-19 14:37:09,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:37:09,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 3 states have call successors, (111), 3 states have call predecessors, (111), 3 states have return successors, (110), 3 states have call predecessors, (110), 3 states have call successors, (110) Word has length 881 [2021-11-19 14:37:09,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:09,980 INFO L225 Difference]: With dead ends: 41760 [2021-11-19 14:37:09,980 INFO L226 Difference]: Without dead ends: 24148 [2021-11-19 14:37:10,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3520 GetRequests, 3511 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:37:10,012 INFO L933 BasicCegarLoop]: 2522 mSDtfsCounter, 1113 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 3882 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:10,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 3882 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:37:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24148 states. [2021-11-19 14:37:12,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24148 to 24142. [2021-11-19 14:37:12,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24142 states, 17462 states have (on average 1.205532012369717) internal successors, (21051), 17570 states have internal predecessors, (21051), 4737 states have call successors, (4737), 1942 states have call predecessors, (4737), 1942 states have return successors, (4755), 4662 states have call predecessors, (4755), 4737 states have call successors, (4755) [2021-11-19 14:37:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24142 states to 24142 states and 30543 transitions. [2021-11-19 14:37:12,288 INFO L78 Accepts]: Start accepts. Automaton has 24142 states and 30543 transitions. Word has length 881 [2021-11-19 14:37:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:12,290 INFO L470 AbstractCegarLoop]: Abstraction has 24142 states and 30543 transitions. [2021-11-19 14:37:12,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 3 states have call successors, (111), 3 states have call predecessors, (111), 3 states have return successors, (110), 3 states have call predecessors, (110), 3 states have call successors, (110) [2021-11-19 14:37:12,291 INFO L276 IsEmpty]: Start isEmpty. Operand 24142 states and 30543 transitions. [2021-11-19 14:37:12,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 907 [2021-11-19 14:37:12,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:12,367 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 23, 23, 21, 21, 21, 14, 14, 14, 14, 14, 14, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:12,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:12,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:12,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:12,795 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:12,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1313603433, now seen corresponding path program 1 times [2021-11-19 14:37:12,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:12,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161389653] [2021-11-19 14:37:12,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:12,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:12,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:12,805 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:12,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 14:37:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:17,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 4625 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:37:17,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3457 backedges. 1472 proven. 8 refuted. 0 times theorem prover too weak. 1977 trivial. 0 not checked. [2021-11-19 14:37:20,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3457 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 3417 trivial. 0 not checked. [2021-11-19 14:37:22,546 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:22,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161389653] [2021-11-19 14:37:22,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161389653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:37:22,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1104182376] [2021-11-19 14:37:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:22,547 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:37:22,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:37:22,555 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:37:22,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-19 14:37:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:24,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 4625 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:37:24,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3457 backedges. 639 proven. 0 refuted. 0 times theorem prover too weak. 2818 trivial. 0 not checked. [2021-11-19 14:37:26,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3457 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3425 trivial. 0 not checked. [2021-11-19 14:37:29,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1104182376] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:29,063 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:37:29,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [6, 6] total 24 [2021-11-19 14:37:29,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139457213] [2021-11-19 14:37:29,064 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:29,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:37:29,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:29,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:37:29,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:37:29,066 INFO L87 Difference]: Start difference. First operand 24142 states and 30543 transitions. Second operand has 16 states, 16 states have (on average 23.6875) internal successors, (379), 14 states have internal predecessors, (379), 4 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (118), 6 states have call predecessors, (118), 4 states have call successors, (118) [2021-11-19 14:37:37,691 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:39,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:39,816 INFO L93 Difference]: Finished difference Result 84945 states and 113164 transitions. [2021-11-19 14:37:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:37:39,817 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 23.6875) internal successors, (379), 14 states have internal predecessors, (379), 4 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (118), 6 states have call predecessors, (118), 4 states have call successors, (118) Word has length 906 [2021-11-19 14:37:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:40,030 INFO L225 Difference]: With dead ends: 84945 [2021-11-19 14:37:40,030 INFO L226 Difference]: Without dead ends: 60835 [2021-11-19 14:37:40,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3630 GetRequests, 3602 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-11-19 14:37:40,085 INFO L933 BasicCegarLoop]: 2406 mSDtfsCounter, 4872 mSDsluCounter, 25367 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 1327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5078 SdHoareTripleChecker+Valid, 27773 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1327 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:40,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5078 Valid, 27773 Invalid, 1561 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1327 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 14:37:40,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60835 states. [2021-11-19 14:37:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60835 to 24277. [2021-11-19 14:37:43,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24277 states, 17552 states have (on average 1.2049908842297175) internal successors, (21150), 17669 states have internal predecessors, (21150), 4773 states have call successors, (4773), 1942 states have call predecessors, (4773), 1951 states have return successors, (4800), 4701 states have call predecessors, (4800), 4773 states have call successors, (4800) [2021-11-19 14:37:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24277 states to 24277 states and 30723 transitions. [2021-11-19 14:37:43,445 INFO L78 Accepts]: Start accepts. Automaton has 24277 states and 30723 transitions. Word has length 906 [2021-11-19 14:37:43,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:43,446 INFO L470 AbstractCegarLoop]: Abstraction has 24277 states and 30723 transitions. [2021-11-19 14:37:43,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 23.6875) internal successors, (379), 14 states have internal predecessors, (379), 4 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (118), 6 states have call predecessors, (118), 4 states have call successors, (118) [2021-11-19 14:37:43,446 INFO L276 IsEmpty]: Start isEmpty. Operand 24277 states and 30723 transitions. [2021-11-19 14:37:43,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2021-11-19 14:37:43,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:43,479 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 23, 23, 21, 21, 21, 14, 14, 14, 14, 14, 14, 8, 7, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:43,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:43,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:43,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:37:43,895 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:43,896 INFO L85 PathProgramCache]: Analyzing trace with hash 58152730, now seen corresponding path program 1 times [2021-11-19 14:37:43,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:43,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5289701] [2021-11-19 14:37:43,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:43,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:43,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:43,901 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:43,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-19 14:37:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:49,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 4888 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:37:49,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3539 backedges. 1472 proven. 8 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-11-19 14:37:51,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3539 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 3495 trivial. 0 not checked. [2021-11-19 14:37:53,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:53,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5289701] [2021-11-19 14:37:53,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5289701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:37:53,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2027115039] [2021-11-19 14:37:53,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:53,811 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:37:53,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:37:53,812 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:37:53,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6681e23-24f9-4896-a985-6a2fe2aef396/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-19 14:37:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:55,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 4888 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:37:55,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3539 backedges. 836 proven. 0 refuted. 0 times theorem prover too weak. 2703 trivial. 0 not checked. [2021-11-19 14:37:57,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3539 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 3503 trivial. 0 not checked. [2021-11-19 14:37:59,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2027115039] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:59,641 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:37:59,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-19 14:37:59,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565490918] [2021-11-19 14:37:59,642 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:59,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:37:59,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:59,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:37:59,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:37:59,646 INFO L87 Difference]: Start difference. First operand 24277 states and 30723 transitions. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 2 states have call successors, (133), 2 states have call predecessors, (133), 2 states have return successors, (132), 2 states have call predecessors, (132), 2 states have call successors, (132) [2021-11-19 14:38:01,556 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []