./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 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/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_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:52:16,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:52:16,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:52:16,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:52:16,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:52:16,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:52:16,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:52:16,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:52:16,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:52:16,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:52:16,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:52:16,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:52:16,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:52:16,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:52:16,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:52:16,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:52:16,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:52:16,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:52:16,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:52:16,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:52:16,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:52:16,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:52:16,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:52:16,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:52:16,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:52:16,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:52:16,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:52:16,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:52:16,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:52:16,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:52:16,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:52:16,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:52:16,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:52:16,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:52:16,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:52:16,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:52:16,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:52:16,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:52:16,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:52:16,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:52:16,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:52:16,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:52:16,313 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:52:16,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:52:16,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:52:16,317 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:52:16,317 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:52:16,318 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:52:16,318 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:52:16,318 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:52:16,318 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:52:16,318 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:52:16,326 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:52:16,326 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:52:16,326 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:52:16,327 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:52:16,327 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:52:16,327 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:52:16,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:52:16,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:52:16,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:52:16,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:52:16,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:52:16,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:52:16,329 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:52:16,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:52:16,330 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:52:16,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:52:16,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:52:16,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:52:16,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:52:16,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:52:16,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:52:16,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:52:16,333 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:52:16,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:52:16,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:52:16,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:52:16,334 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:52:16,335 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_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 [2021-11-12 23:52:16,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:52:16,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:52:16,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:52:16,684 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:52:16,685 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:52:16,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-12 23:52:16,770 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/data/abeb716ef/807552e6c45149f6b0735f81c38f0031/FLAG5bd5f6d5f [2021-11-12 23:52:17,800 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:52:17,801 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-12 23:52:17,864 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/data/abeb716ef/807552e6c45149f6b0735f81c38f0031/FLAG5bd5f6d5f [2021-11-12 23:52:18,128 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/data/abeb716ef/807552e6c45149f6b0735f81c38f0031 [2021-11-12 23:52:18,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:52:18,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:52:18,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:52:18,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:52:18,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:52:18,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:52:18" (1/1) ... [2021-11-12 23:52:18,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39eabaa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:18, skipping insertion in model container [2021-11-12 23:52:18,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:52:18" (1/1) ... [2021-11-12 23:52:18,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:52:18,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:52:19,698 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:52:19,995 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:52:20,986 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-12 23:52:20,989 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-12 23:52:21,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:52:21,050 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) [2021-11-12 23:52:21,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@582d02b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:21, skipping insertion in model container [2021-11-12 23:52:21,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:52:21,053 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:52:21,057 INFO L158 Benchmark]: Toolchain (without parser) took 2921.70ms. Allocated memory was 115.3MB in the beginning and 151.0MB in the end (delta: 35.7MB). Free memory was 70.2MB in the beginning and 97.0MB in the end (delta: -26.8MB). Peak memory consumption was 32.2MB. Max. memory is 16.1GB. [2021-11-12 23:52:21,059 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 86.0MB. Free memory was 42.5MB in the beginning and 42.4MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:52:21,060 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2918.27ms. Allocated memory was 115.3MB in the beginning and 151.0MB in the end (delta: 35.7MB). Free memory was 69.9MB in the beginning and 97.0MB in the end (delta: -27.1MB). Peak memory consumption was 32.2MB. Max. memory is 16.1GB. [2021-11-12 23:52:21,063 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 86.0MB. Free memory was 42.5MB in the beginning and 42.4MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2918.27ms. Allocated memory was 115.3MB in the beginning and 151.0MB in the end (delta: 35.7MB). Free memory was 69.9MB in the beginning and 97.0MB in the end (delta: -27.1MB). Peak memory consumption was 32.2MB. 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_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/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_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:52:23,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:52:23,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:52:23,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:52:23,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:52:23,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:52:23,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:52:23,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:52:23,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:52:23,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:52:23,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:52:23,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:52:23,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:52:23,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:52:23,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:52:23,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:52:23,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:52:23,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:52:23,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:52:23,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:52:23,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:52:23,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:52:23,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:52:23,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:52:23,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:52:23,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:52:23,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:52:23,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:52:23,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:52:23,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:52:23,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:52:23,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:52:23,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:52:23,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:52:23,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:52:23,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:52:23,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:52:23,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:52:23,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:52:23,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:52:23,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:52:23,531 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:52:23,578 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:52:23,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:52:23,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:52:23,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:52:23,581 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:52:23,581 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:52:23,581 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:52:23,581 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:52:23,581 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:52:23,581 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:52:23,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:52:23,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:52:23,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:52:23,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:52:23,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:52:23,583 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:52:23,583 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:52:23,583 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:52:23,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:52:23,584 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:52:23,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:52:23,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:52:23,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:52:23,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:52:23,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:52:23,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:52:23,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:52:23,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:52:23,585 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:52:23,585 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:23,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:52:23,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:52:23,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:52:23,586 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_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 [2021-11-12 23:52:23,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:52:24,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:52:24,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:52:24,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:52:24,021 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:52:24,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-12 23:52:24,108 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/data/6c13aa637/4e5382e9c4d8487382b97ca0b66b68ac/FLAG47a7d2bb2 [2021-11-12 23:52:25,036 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:52:25,037 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-12 23:52:25,132 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/data/6c13aa637/4e5382e9c4d8487382b97ca0b66b68ac/FLAG47a7d2bb2 [2021-11-12 23:52:25,467 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/data/6c13aa637/4e5382e9c4d8487382b97ca0b66b68ac [2021-11-12 23:52:25,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:52:25,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:52:25,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:52:25,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:52:25,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:52:25,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:52:25" (1/1) ... [2021-11-12 23:52:25,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ff4843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:25, skipping insertion in model container [2021-11-12 23:52:25,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:52:25" (1/1) ... [2021-11-12 23:52:25,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:52:25,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:52:28,186 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-12 23:52:28,189 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-12 23:52:28,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:52:28,293 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:52:28,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:52:28,774 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-12 23:52:28,774 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-12 23:52:28,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:52:28,810 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:52:29,153 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-12 23:52:29,153 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-12 23:52:29,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:52:29,385 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:52:29,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:29 WrapperNode [2021-11-12 23:52:29,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:52:29,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:52:29,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:52:29,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:52:29,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:29" (1/1) ... [2021-11-12 23:52:29,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:29" (1/1) ... [2021-11-12 23:52:29,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:52:29,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:52:29,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:52:29,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:52:29,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:29" (1/1) ... [2021-11-12 23:52:29,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:29" (1/1) ... [2021-11-12 23:52:29,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:29" (1/1) ... [2021-11-12 23:52:29,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:29" (1/1) ... [2021-11-12 23:52:29,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:29" (1/1) ... [2021-11-12 23:52:29,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:29" (1/1) ... [2021-11-12 23:52:29,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:29" (1/1) ... [2021-11-12 23:52:30,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:52:30,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:52:30,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:52:30,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:52:30,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:29" (1/1) ... [2021-11-12 23:52:30,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:52:30,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:52:30,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:52:30,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:52:30,095 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_95 [2021-11-12 23:52:30,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_95 [2021-11-12 23:52:30,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 23:52:30,096 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 23:52:30,096 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-12 23:52:30,096 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-12 23:52:30,097 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:52:30,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:52:30,097 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_91 [2021-11-12 23:52:30,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_91 [2021-11-12 23:52:30,097 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_open [2021-11-12 23:52:30,097 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_open [2021-11-12 23:52:30,098 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 23:52:30,098 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-12 23:52:30,098 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-12 23:52:30,098 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resume [2021-11-12 23:52:30,098 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resume [2021-11-12 23:52:30,098 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-12 23:52:30,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-12 23:52:30,099 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-12 23:52:30,099 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-12 23:52:30,099 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-12 23:52:30,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-12 23:52:30,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:52:30,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 23:52:30,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:52:30,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:52:30,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:52:30,100 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-12 23:52:30,100 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-12 23:52:30,100 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_device_lock_of_kaweth_device [2021-11-12 23:52:30,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_device_lock_of_kaweth_device [2021-11-12 23:52:30,101 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resubmit_rx_urb [2021-11-12 23:52:30,101 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resubmit_rx_urb [2021-11-12 23:52:30,101 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-12 23:52:30,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-12 23:52:30,101 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-12 23:52:30,102 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-12 23:52:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_after_alloc [2021-11-12 23:52:30,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_after_alloc [2021-11-12 23:52:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:52:30,102 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:52:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-12 23:52:30,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-12 23:52:30,103 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-12 23:52:30,103 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-12 23:52:30,103 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-12 23:52:30,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-12 23:52:30,103 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_close [2021-11-12 23:52:30,104 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_close [2021-11-12 23:52:30,104 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_download_firmware [2021-11-12 23:52:30,104 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_download_firmware [2021-11-12 23:52:30,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:52:30,104 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-12 23:52:30,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-12 23:52:30,105 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-12 23:52:30,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-12 23:52:30,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:52:30,105 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-12 23:52:30,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:52:30,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 23:52:30,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:52:30,106 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_exclusive_spin_is_locked [2021-11-12 23:52:30,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_exclusive_spin_is_locked [2021-11-12 23:52:30,106 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert [2021-11-12 23:52:30,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert [2021-11-12 23:52:30,106 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-12 23:52:30,106 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-12 23:52:30,107 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-12 23:52:30,107 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-12 23:52:30,107 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-12 23:52:30,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-12 23:52:30,107 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2021-11-12 23:52:30,107 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2021-11-12 23:52:30,108 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-12 23:52:30,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-12 23:52:30,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:52:30,108 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_tx_timeout [2021-11-12 23:52:30,108 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_tx_timeout [2021-11-12 23:52:30,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:52:30,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:52:30,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:52:30,109 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_kaweth_driver_exit_11_2 [2021-11-12 23:52:30,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_kaweth_driver_exit_11_2 [2021-11-12 23:52:30,109 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-12 23:52:30,109 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-12 23:52:30,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:52:30,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:52:30,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:52:30,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 23:52:30,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:52:30,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:52:30,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:52:30,111 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-12 23:52:30,111 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-12 23:52:30,111 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_async_set_rx_mode [2021-11-12 23:52:30,111 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_async_set_rx_mode [2021-11-12 23:52:30,111 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-12 23:52:30,111 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-12 23:52:30,112 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-12 23:52:30,112 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-12 23:52:30,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:52:30,112 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-12 23:52:30,112 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-12 23:52:30,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:52:30,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:52:30,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:52:30,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:52:30,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:52:30,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:52:30,113 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-12 23:52:30,113 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-12 23:52:30,114 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-12 23:52:30,114 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-12 23:52:30,114 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-12 23:52:30,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-12 23:52:30,114 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2021-11-12 23:52:30,114 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2021-11-12 23:52:30,115 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-12 23:52:30,115 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-12 23:52:30,115 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-12 23:52:30,115 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-12 23:52:30,115 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-12 23:52:30,115 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-12 23:52:30,116 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_set_rx_mode [2021-11-12 23:52:30,116 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_set_rx_mode [2021-11-12 23:52:30,116 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-12 23:52:30,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-12 23:52:30,116 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 23:52:30,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 23:52:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:52:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 23:52:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:52:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:52:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 23:52:30,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 23:52:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_resubmit_int_urb [2021-11-12 23:52:30,118 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_resubmit_int_urb [2021-11-12 23:52:30,118 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_control [2021-11-12 23:52:30,118 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_control [2021-11-12 23:52:30,118 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-12 23:52:30,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-12 23:52:30,118 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_device_lock_of_kaweth_device [2021-11-12 23:52:30,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_device_lock_of_kaweth_device [2021-11-12 23:52:30,119 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2021-11-12 23:52:30,119 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_kill_urbs [2021-11-12 23:52:30,119 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_kill_urbs [2021-11-12 23:52:30,119 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_3_4 [2021-11-12 23:52:30,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_3_4 [2021-11-12 23:52:30,119 INFO L130 BoogieDeclarations]: Found specification of procedure kaweth_disconnect [2021-11-12 23:52:30,120 INFO L138 BoogieDeclarations]: Found implementation of procedure kaweth_disconnect [2021-11-12 23:52:30,120 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-12 23:52:30,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-12 23:52:30,120 INFO L130 BoogieDeclarations]: Found specification of procedure preempt_count [2021-11-12 23:52:30,120 INFO L138 BoogieDeclarations]: Found implementation of procedure preempt_count [2021-11-12 23:52:32,264 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:53:36,974 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-12 23:53:37,080 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:53:37,081 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:53:37,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:53:37 BoogieIcfgContainer [2021-11-12 23:53:37,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:53:37,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:53:37,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:53:37,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:53:37,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:52:25" (1/3) ... [2021-11-12 23:53:37,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2fe010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:53:37, skipping insertion in model container [2021-11-12 23:53:37,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:52:29" (2/3) ... [2021-11-12 23:53:37,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2fe010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:53:37, skipping insertion in model container [2021-11-12 23:53:37,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:53:37" (3/3) ... [2021-11-12 23:53:37,095 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-12 23:53:37,101 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:53:37,101 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:53:37,161 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:53:37,168 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 [2021-11-12 23:53:37,168 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:53:37,223 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) [2021-11-12 23:53:37,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-12 23:53:37,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:37,260 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] [2021-11-12 23:53:37,261 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:37,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1127043965, now seen corresponding path program 1 times [2021-11-12 23:53:37,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:37,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319254212] [2021-11-12 23:53:37,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:37,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:37,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:37,304 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:37,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:53:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:47,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 3039 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:53:47,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-11-12 23:53:48,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-12 23:53:49,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:49,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319254212] [2021-11-12 23:53:49,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319254212] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:49,263 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:49,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:53:49,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106235441] [2021-11-12 23:53:49,266 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:49,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:53:49,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:49,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:53:49,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:53:49,300 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) [2021-11-12 23:53:51,723 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:55,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:55,424 INFO L93 Difference]: Finished difference Result 3294 states and 4529 transitions. [2021-11-12 23:53:55,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:53:55,427 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 [2021-11-12 23:53:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:55,469 INFO L225 Difference]: With dead ends: 3294 [2021-11-12 23:53:55,469 INFO L226 Difference]: Without dead ends: 2106 [2021-11-12 23:53:55,492 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 [2021-11-12 23:53:55,498 INFO L933 BasicCegarLoop]: 1763 mSDtfsCounter, 2055 mSDsluCounter, 1930 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5367.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2055 SdHoareTripleChecker+Valid, 3693 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.86ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5784.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:55,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2055 Valid, 3693 Invalid, 633 Unknown, 0 Unchecked, 40.86ms Time], IncrementalHoareTripleChecker [33 Valid, 599 Invalid, 1 Unknown, 0 Unchecked, 5784.32ms Time] [2021-11-12 23:53:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-11-12 23:53:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2098. [2021-11-12 23:53:55,757 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) [2021-11-12 23:53:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2782 transitions. [2021-11-12 23:53:55,782 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2782 transitions. Word has length 155 [2021-11-12 23:53:55,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:55,786 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 2782 transitions. [2021-11-12 23:53:55,786 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) [2021-11-12 23:53:55,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2782 transitions. [2021-11-12 23:53:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-12 23:53:55,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:55,801 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] [2021-11-12 23:53:55,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:56,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:56,024 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:56,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:56,025 INFO L85 PathProgramCache]: Analyzing trace with hash 684871418, now seen corresponding path program 1 times [2021-11-12 23:53:56,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:56,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736962337] [2021-11-12 23:53:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:56,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:56,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:56,042 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:56,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:54:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:06,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 3028 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:54:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-11-12 23:54:07,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-12 23:54:07,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:07,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736962337] [2021-11-12 23:54:07,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736962337] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:07,689 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:54:07,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:54:07,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086350272] [2021-11-12 23:54:07,689 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:07,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:54:07,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:07,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:54:07,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:54:07,700 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) [2021-11-12 23:54:10,128 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:10,716 INFO L93 Difference]: Finished difference Result 5587 states and 7418 transitions. [2021-11-12 23:54:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:54:10,717 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 [2021-11-12 23:54:10,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:10,750 INFO L225 Difference]: With dead ends: 5587 [2021-11-12 23:54:10,750 INFO L226 Difference]: Without dead ends: 3510 [2021-11-12 23:54:10,759 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 [2021-11-12 23:54:10,760 INFO L933 BasicCegarLoop]: 1633 mSDtfsCounter, 1156 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2578.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 2981 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.87ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2702.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:10,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1156 Valid, 2981 Invalid, 47 Unknown, 0 Unchecked, 12.87ms Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 1 Unknown, 0 Unchecked, 2702.97ms Time] [2021-11-12 23:54:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2021-11-12 23:54:10,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 3506. [2021-11-12 23:54:10,938 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) [2021-11-12 23:54:10,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 4647 transitions. [2021-11-12 23:54:10,978 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 4647 transitions. Word has length 178 [2021-11-12 23:54:10,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:10,980 INFO L470 AbstractCegarLoop]: Abstraction has 3506 states and 4647 transitions. [2021-11-12 23:54:10,981 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) [2021-11-12 23:54:10,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 4647 transitions. [2021-11-12 23:54:10,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 23:54:10,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:10,987 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] [2021-11-12 23:54:11,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:11,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:11,212 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:11,212 INFO L85 PathProgramCache]: Analyzing trace with hash 220309175, now seen corresponding path program 1 times [2021-11-12 23:54:11,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:11,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142312260] [2021-11-12 23:54:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:11,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:11,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:11,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:11,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:54:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:21,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 3077 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:54:21,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-11-12 23:54:21,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-11-12 23:54:22,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:22,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142312260] [2021-11-12 23:54:22,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142312260] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:22,398 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:54:22,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:54:22,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227077773] [2021-11-12 23:54:22,399 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:22,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:54:22,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:22,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:54:22,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:54:22,401 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) [2021-11-12 23:54:24,825 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:28,501 INFO L93 Difference]: Finished difference Result 13877 states and 18387 transitions. [2021-11-12 23:54:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:54:28,502 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 [2021-11-12 23:54:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:28,592 INFO L225 Difference]: With dead ends: 13877 [2021-11-12 23:54:28,593 INFO L226 Difference]: Without dead ends: 10392 [2021-11-12 23:54:28,614 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 [2021-11-12 23:54:28,617 INFO L933 BasicCegarLoop]: 2895 mSDtfsCounter, 2737 mSDsluCounter, 2623 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5184.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2737 SdHoareTripleChecker+Valid, 5518 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.48ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5527.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:28,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2737 Valid, 5518 Invalid, 532 Unknown, 0 Unchecked, 31.48ms Time], IncrementalHoareTripleChecker [9 Valid, 522 Invalid, 1 Unknown, 0 Unchecked, 5527.24ms Time] [2021-11-12 23:54:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10392 states. [2021-11-12 23:54:29,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10392 to 10376. [2021-11-12 23:54:29,162 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) [2021-11-12 23:54:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10376 states to 10376 states and 13731 transitions. [2021-11-12 23:54:29,217 INFO L78 Accepts]: Start accepts. Automaton has 10376 states and 13731 transitions. Word has length 179 [2021-11-12 23:54:29,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:29,218 INFO L470 AbstractCegarLoop]: Abstraction has 10376 states and 13731 transitions. [2021-11-12 23:54:29,218 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) [2021-11-12 23:54:29,218 INFO L276 IsEmpty]: Start isEmpty. Operand 10376 states and 13731 transitions. [2021-11-12 23:54:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-12 23:54:29,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:29,227 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] [2021-11-12 23:54:29,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:29,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:29,452 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:29,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:29,453 INFO L85 PathProgramCache]: Analyzing trace with hash 417858523, now seen corresponding path program 1 times [2021-11-12 23:54:29,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:29,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806223288] [2021-11-12 23:54:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:29,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:29,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:29,465 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:29,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:54:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:39,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 3220 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:54:39,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2021-11-12 23:54:40,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-11-12 23:54:40,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:40,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806223288] [2021-11-12 23:54:40,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806223288] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:40,806 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:54:40,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:54:40,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745667107] [2021-11-12 23:54:40,807 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:40,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:54:40,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:40,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:54:40,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:54:40,808 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) [2021-11-12 23:54:43,221 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 [] [2021-11-12 23:54:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:46,870 INFO L93 Difference]: Finished difference Result 26524 states and 34820 transitions. [2021-11-12 23:54:46,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:54:46,871 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 [2021-11-12 23:54:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:47,008 INFO L225 Difference]: With dead ends: 26524 [2021-11-12 23:54:47,008 INFO L226 Difference]: Without dead ends: 16169 [2021-11-12 23:54:47,059 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 [2021-11-12 23:54:47,061 INFO L933 BasicCegarLoop]: 2072 mSDtfsCounter, 2403 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 314 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4916.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2403 SdHoareTripleChecker+Valid, 3485 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.36ms SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5284.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:47,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2403 Valid, 3485 Invalid, 731 Unknown, 0 Unchecked, 22.36ms Time], IncrementalHoareTripleChecker [314 Valid, 416 Invalid, 1 Unknown, 0 Unchecked, 5284.48ms Time] [2021-11-12 23:54:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16169 states. [2021-11-12 23:54:47,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16169 to 16157. [2021-11-12 23:54:47,884 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) [2021-11-12 23:54:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16157 states to 16157 states and 21048 transitions. [2021-11-12 23:54:47,959 INFO L78 Accepts]: Start accepts. Automaton has 16157 states and 21048 transitions. Word has length 244 [2021-11-12 23:54:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:47,961 INFO L470 AbstractCegarLoop]: Abstraction has 16157 states and 21048 transitions. [2021-11-12 23:54:47,963 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) [2021-11-12 23:54:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 16157 states and 21048 transitions. [2021-11-12 23:54:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-11-12 23:54:47,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:47,975 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] [2021-11-12 23:54:48,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:48,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:48,188 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:48,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:48,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1412042382, now seen corresponding path program 1 times [2021-11-12 23:54:48,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:48,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302097384] [2021-11-12 23:54:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:48,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:48,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:48,194 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:48,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:54:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:58,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 3571 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:54:58,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 859 trivial. 0 not checked. [2021-11-12 23:54:59,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:55:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2021-11-12 23:55:00,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:55:00,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302097384] [2021-11-12 23:55:00,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302097384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:55:00,864 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:55:00,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:55:00,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881704975] [2021-11-12 23:55:00,864 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:55:00,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:55:00,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:55:00,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:55:00,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:55:00,867 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) [2021-11-12 23:55:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:55:04,454 INFO L93 Difference]: Finished difference Result 41959 states and 55795 transitions. [2021-11-12 23:55:04,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:55:04,455 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 [2021-11-12 23:55:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:55:04,586 INFO L225 Difference]: With dead ends: 41959 [2021-11-12 23:55:04,586 INFO L226 Difference]: Without dead ends: 25823 [2021-11-12 23:55:04,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:55:04,653 INFO L933 BasicCegarLoop]: 1823 mSDtfsCounter, 1961 mSDsluCounter, 5203 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2142.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2031 SdHoareTripleChecker+Valid, 7026 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.81ms SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2293.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:55:04,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2031 Valid, 7026 Invalid, 520 Unknown, 0 Unchecked, 23.81ms Time], IncrementalHoareTripleChecker [428 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 2293.23ms Time] [2021-11-12 23:55:04,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25823 states. [2021-11-12 23:55:06,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25823 to 16175. [2021-11-12 23:55:06,022 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) [2021-11-12 23:55:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16175 states to 16175 states and 21066 transitions. [2021-11-12 23:55:06,088 INFO L78 Accepts]: Start accepts. Automaton has 16175 states and 21066 transitions. Word has length 363 [2021-11-12 23:55:06,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:55:06,089 INFO L470 AbstractCegarLoop]: Abstraction has 16175 states and 21066 transitions. [2021-11-12 23:55:06,089 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) [2021-11-12 23:55:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 16175 states and 21066 transitions. [2021-11-12 23:55:06,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-11-12 23:55:06,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:55:06,102 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] [2021-11-12 23:55:06,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:55:06,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:55:06,327 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:55:06,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:55:06,328 INFO L85 PathProgramCache]: Analyzing trace with hash -528133826, now seen corresponding path program 1 times [2021-11-12 23:55:06,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:55:06,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474774290] [2021-11-12 23:55:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:55:06,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:55:06,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:55:06,334 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:55:06,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:55:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:55:17,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 3618 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:55:17,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:55:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-12 23:55:18,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:55:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-12 23:55:19,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:55:19,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474774290] [2021-11-12 23:55:19,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474774290] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:55:19,026 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:55:19,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:55:19,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831214487] [2021-11-12 23:55:19,026 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:55:19,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:55:19,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:55:19,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:55:19,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:55:19,028 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) [2021-11-12 23:55:20,298 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:21,310 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:55:22,743 INFO L93 Difference]: Finished difference Result 32365 states and 42151 transitions. [2021-11-12 23:55:22,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:55:22,759 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 [2021-11-12 23:55:22,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:55:22,832 INFO L225 Difference]: With dead ends: 32365 [2021-11-12 23:55:22,833 INFO L226 Difference]: Without dead ends: 16211 [2021-11-12 23:55:22,870 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 [2021-11-12 23:55:22,871 INFO L933 BasicCegarLoop]: 1408 mSDtfsCounter, 12 mSDsluCounter, 2814 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2953.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 4222 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.88ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2988.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:55:22,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 4222 Invalid, 15 Unknown, 0 Unchecked, 5.88ms Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 2988.05ms Time] [2021-11-12 23:55:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16211 states. [2021-11-12 23:55:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16211 to 16211. [2021-11-12 23:55:23,715 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) [2021-11-12 23:55:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16211 states to 16211 states and 21102 transitions. [2021-11-12 23:55:23,784 INFO L78 Accepts]: Start accepts. Automaton has 16211 states and 21102 transitions. Word has length 384 [2021-11-12 23:55:23,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:55:23,786 INFO L470 AbstractCegarLoop]: Abstraction has 16211 states and 21102 transitions. [2021-11-12 23:55:23,786 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) [2021-11-12 23:55:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 16211 states and 21102 transitions. [2021-11-12 23:55:23,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-12 23:55:23,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:55:23,800 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] [2021-11-12 23:55:23,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:55:24,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:55:24,016 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:55:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:55:24,017 INFO L85 PathProgramCache]: Analyzing trace with hash 78436980, now seen corresponding path program 1 times [2021-11-12 23:55:24,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:55:24,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054264647] [2021-11-12 23:55:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:55:24,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:55:24,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:55:24,027 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:55:24,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:55:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:55:35,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 3630 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:55:35,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:55:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-12 23:55:36,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:55:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-12 23:55:37,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:55:37,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054264647] [2021-11-12 23:55:37,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054264647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:55:37,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1222043071] [2021-11-12 23:55:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:55:37,051 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:55:37,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:55:37,052 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:55:37,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 23:55:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:55:39,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 3630 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:55:40,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:55:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:55:42,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:55:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:55:44,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1222043071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:55:44,922 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:55:44,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-12 23:55:44,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920127930] [2021-11-12 23:55:44,923 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:55:44,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:55:44,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:55:44,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:55:44,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:55:44,925 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) [2021-11-12 23:55:47,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:50,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:55:50,339 INFO L93 Difference]: Finished difference Result 32401 states and 42634 transitions. [2021-11-12 23:55:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:55:50,340 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 [2021-11-12 23:55:50,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:55:50,419 INFO L225 Difference]: With dead ends: 32401 [2021-11-12 23:55:50,419 INFO L226 Difference]: Without dead ends: 16211 [2021-11-12 23:55:50,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1564 GetRequests, 1553 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:55:50,586 INFO L933 BasicCegarLoop]: 1408 mSDtfsCounter, 1223 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4420.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 2309 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.57ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4731.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:55:50,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 2309 Invalid, 551 Unknown, 0 Unchecked, 8.57ms Time], IncrementalHoareTripleChecker [42 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 4731.20ms Time] [2021-11-12 23:55:50,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16211 states. [2021-11-12 23:55:51,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16211 to 16211. [2021-11-12 23:55:51,507 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) [2021-11-12 23:55:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16211 states to 16211 states and 21072 transitions. [2021-11-12 23:55:51,574 INFO L78 Accepts]: Start accepts. Automaton has 16211 states and 21072 transitions. Word has length 392 [2021-11-12 23:55:51,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:55:51,576 INFO L470 AbstractCegarLoop]: Abstraction has 16211 states and 21072 transitions. [2021-11-12 23:55:51,576 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) [2021-11-12 23:55:51,576 INFO L276 IsEmpty]: Start isEmpty. Operand 16211 states and 21072 transitions. [2021-11-12 23:55:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-11-12 23:55:51,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:55:51,588 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] [2021-11-12 23:55:51,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:55:51,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:55:52,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:55:52,008 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:55:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:55:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash 372836895, now seen corresponding path program 1 times [2021-11-12 23:55:52,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:55:52,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492879163] [2021-11-12 23:55:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:55:52,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:55:52,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:55:52,018 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:55:52,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:56:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:56:03,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 3631 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:56:03,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:56:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-12 23:56:04,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:56:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-12 23:56:05,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:56:05,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492879163] [2021-11-12 23:56:05,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492879163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:56:05,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1797195610] [2021-11-12 23:56:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:56:05,329 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:56:05,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:56:05,332 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:56:05,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:56:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:56:08,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 3631 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:56:08,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:56:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:56:11,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:56:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:56:13,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1797195610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:56:13,134 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:56:13,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-12 23:56:13,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846493270] [2021-11-12 23:56:13,135 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:56:13,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:56:13,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:56:13,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:56:13,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:56:13,139 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) [2021-11-12 23:56:15,561 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:18,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:56:18,718 INFO L93 Difference]: Finished difference Result 32401 states and 42574 transitions. [2021-11-12 23:56:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:56:18,719 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 [2021-11-12 23:56:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:56:18,786 INFO L225 Difference]: With dead ends: 32401 [2021-11-12 23:56:18,787 INFO L226 Difference]: Without dead ends: 16211 [2021-11-12 23:56:18,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1557 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:56:18,831 INFO L933 BasicCegarLoop]: 1407 mSDtfsCounter, 1222 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4476.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 2307 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.77ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4790.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:56:18,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1222 Valid, 2307 Invalid, 551 Unknown, 0 Unchecked, 8.77ms Time], IncrementalHoareTripleChecker [42 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 4790.30ms Time] [2021-11-12 23:56:18,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16211 states. [2021-11-12 23:56:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16211 to 16211. [2021-11-12 23:56:19,924 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) [2021-11-12 23:56:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16211 states to 16211 states and 21042 transitions. [2021-11-12 23:56:19,989 INFO L78 Accepts]: Start accepts. Automaton has 16211 states and 21042 transitions. Word has length 393 [2021-11-12 23:56:19,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:56:19,991 INFO L470 AbstractCegarLoop]: Abstraction has 16211 states and 21042 transitions. [2021-11-12 23:56:19,991 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) [2021-11-12 23:56:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 16211 states and 21042 transitions. [2021-11-12 23:56:19,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-11-12 23:56:19,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:56:19,999 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] [2021-11-12 23:56:20,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:56:20,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:56:20,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:56:20,416 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:56:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:56:20,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1023816272, now seen corresponding path program 1 times [2021-11-12 23:56:20,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:56:20,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920035367] [2021-11-12 23:56:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:56:20,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:56:20,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:56:20,426 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:56:20,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:56:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:56:31,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 3632 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:56:31,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:56:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-12 23:56:32,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:56:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-12 23:56:33,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:56:33,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920035367] [2021-11-12 23:56:33,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920035367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:56:33,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [904972072] [2021-11-12 23:56:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:56:33,387 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:56:33,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:56:33,388 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:56:33,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 23:56:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:56:36,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 3632 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:56:36,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:56:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:56:39,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:56:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:56:41,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [904972072] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:56:41,230 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:56:41,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-12 23:56:41,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156335123] [2021-11-12 23:56:41,231 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:56:41,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:56:41,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:56:41,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:56:41,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:56:41,233 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) [2021-11-12 23:56:43,667 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:47,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:56:47,275 INFO L93 Difference]: Finished difference Result 32401 states and 42514 transitions. [2021-11-12 23:56:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:56:47,276 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 [2021-11-12 23:56:47,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:56:47,349 INFO L225 Difference]: With dead ends: 32401 [2021-11-12 23:56:47,350 INFO L226 Difference]: Without dead ends: 16211 [2021-11-12 23:56:47,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1572 GetRequests, 1561 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:56:47,398 INFO L933 BasicCegarLoop]: 1406 mSDtfsCounter, 1984 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 474 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4741.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1984 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.76ms SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5092.96ms IncrementalHoareTripleChecker+Time [2021-11-12 23:56:47,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1984 Valid, 2305 Invalid, 983 Unknown, 0 Unchecked, 11.76ms Time], IncrementalHoareTripleChecker [474 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 5092.96ms Time] [2021-11-12 23:56:47,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16211 states. [2021-11-12 23:56:48,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16211 to 16211. [2021-11-12 23:56:48,558 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) [2021-11-12 23:56:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16211 states to 16211 states and 21012 transitions. [2021-11-12 23:56:48,634 INFO L78 Accepts]: Start accepts. Automaton has 16211 states and 21012 transitions. Word has length 394 [2021-11-12 23:56:48,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:56:48,636 INFO L470 AbstractCegarLoop]: Abstraction has 16211 states and 21012 transitions. [2021-11-12 23:56:48,636 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) [2021-11-12 23:56:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 16211 states and 21012 transitions. [2021-11-12 23:56:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-11-12 23:56:48,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:56:48,646 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] [2021-11-12 23:56:48,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:56:48,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:56:49,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:56:49,073 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:56:49,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:56:49,074 INFO L85 PathProgramCache]: Analyzing trace with hash -156142917, now seen corresponding path program 1 times [2021-11-12 23:56:49,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:56:49,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999334884] [2021-11-12 23:56:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:56:49,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:56:49,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:56:49,085 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:56:49,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:57:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:57:00,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 3633 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:57:00,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:57:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-12 23:57:01,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:57:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-12 23:57:02,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:57:02,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999334884] [2021-11-12 23:57:02,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999334884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:57:02,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1525453841] [2021-11-12 23:57:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:57:02,837 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:57:02,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:57:02,838 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:57:02,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:57:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:57:06,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 3633 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:57:06,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:57:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:57:09,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:57:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:57:11,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1525453841] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:57:11,969 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:57:11,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-12 23:57:11,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40322578] [2021-11-12 23:57:11,970 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:57:11,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:57:11,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:57:11,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:57:11,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:57:11,973 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) [2021-11-12 23:57:14,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:57:19,094 INFO L93 Difference]: Finished difference Result 33825 states and 43988 transitions. [2021-11-12 23:57:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:57:19,095 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 [2021-11-12 23:57:19,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:57:19,175 INFO L225 Difference]: With dead ends: 33825 [2021-11-12 23:57:19,176 INFO L226 Difference]: Without dead ends: 17635 [2021-11-12 23:57:19,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1576 GetRequests, 1565 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:57:19,228 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 1412 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5496.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 2819 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.65ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5886.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:57:19,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 2819 Invalid, 711 Unknown, 0 Unchecked, 13.65ms Time], IncrementalHoareTripleChecker [45 Valid, 665 Invalid, 1 Unknown, 0 Unchecked, 5886.93ms Time] [2021-11-12 23:57:19,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17635 states. [2021-11-12 23:57:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17635 to 17633. [2021-11-12 23:57:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17633 states, 12711 states have (on average 1.2209896939658564) internal successors, (15520), 12792 states have internal predecessors, (15520), 3472 states have call successors, (3472), 1449 states have call predecessors, (3472), 1449 states have return successors, (3481), 3424 states have call predecessors, (3481), 3472 states have call successors, (3481) [2021-11-12 23:57:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17633 states to 17633 states and 22473 transitions. [2021-11-12 23:57:20,736 INFO L78 Accepts]: Start accepts. Automaton has 17633 states and 22473 transitions. Word has length 395 [2021-11-12 23:57:20,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:57:20,737 INFO L470 AbstractCegarLoop]: Abstraction has 17633 states and 22473 transitions. [2021-11-12 23:57:20,738 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) [2021-11-12 23:57:20,738 INFO L276 IsEmpty]: Start isEmpty. Operand 17633 states and 22473 transitions. [2021-11-12 23:57:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-11-12 23:57:20,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:57:20,747 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] [2021-11-12 23:57:20,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:57:20,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-12 23:57:21,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:57:21,164 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:57:21,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:57:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2034344492, now seen corresponding path program 1 times [2021-11-12 23:57:21,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:57:21,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141548819] [2021-11-12 23:57:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:57:21,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:57:21,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:57:21,174 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:57:21,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:57:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:57:33,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 3634 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:57:33,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:57:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-12 23:57:33,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:57:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-12 23:57:34,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:57:34,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141548819] [2021-11-12 23:57:34,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141548819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:57:34,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [464573751] [2021-11-12 23:57:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:57:34,669 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:57:34,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:57:34,670 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:57:34,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:57:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:57:37,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 3634 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:57:37,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:57:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:57:40,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:57:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:57:42,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [464573751] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:57:42,889 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:57:42,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-12 23:57:42,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118547357] [2021-11-12 23:57:42,890 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:57:42,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:57:42,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:57:42,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:57:42,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:57:42,892 INFO L87 Difference]: Start difference. First operand 17633 states and 22473 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) [2021-11-12 23:57:45,315 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:57:49,084 INFO L93 Difference]: Finished difference Result 35245 states and 45289 transitions. [2021-11-12 23:57:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:57:49,084 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 [2021-11-12 23:57:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:57:49,149 INFO L225 Difference]: With dead ends: 35245 [2021-11-12 23:57:49,150 INFO L226 Difference]: Without dead ends: 17633 [2021-11-12 23:57:49,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1580 GetRequests, 1569 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:57:49,197 INFO L933 BasicCegarLoop]: 1405 mSDtfsCounter, 1980 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 474 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4780.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1980 SdHoareTripleChecker+Valid, 2303 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.82ms SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5121.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:57:49,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1980 Valid, 2303 Invalid, 983 Unknown, 0 Unchecked, 11.82ms Time], IncrementalHoareTripleChecker [474 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 5121.50ms Time] [2021-11-12 23:57:49,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17633 states. [2021-11-12 23:57:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17633 to 17633. [2021-11-12 23:57:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17633 states, 12711 states have (on average 1.2191015655731257) internal successors, (15496), 12792 states have internal predecessors, (15496), 3472 states have call successors, (3472), 1449 states have call predecessors, (3472), 1449 states have return successors, (3481), 3424 states have call predecessors, (3481), 3472 states have call successors, (3481) [2021-11-12 23:57:50,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17633 states to 17633 states and 22449 transitions. [2021-11-12 23:57:50,416 INFO L78 Accepts]: Start accepts. Automaton has 17633 states and 22449 transitions. Word has length 396 [2021-11-12 23:57:50,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:57:50,418 INFO L470 AbstractCegarLoop]: Abstraction has 17633 states and 22449 transitions. [2021-11-12 23:57:50,418 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) [2021-11-12 23:57:50,418 INFO L276 IsEmpty]: Start isEmpty. Operand 17633 states and 22449 transitions. [2021-11-12 23:57:50,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-11-12 23:57:50,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:57:50,427 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] [2021-11-12 23:57:50,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:57:50,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-12 23:57:50,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:57:50,847 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:57:50,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:57:50,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1334494039, now seen corresponding path program 1 times [2021-11-12 23:57:50,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:57:50,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958558195] [2021-11-12 23:57:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:57:50,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:57:50,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:57:50,875 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:57:50,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:58:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:58:02,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 3635 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:58:02,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:58:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-12 23:58:03,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:58:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-12 23:58:04,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:58:04,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958558195] [2021-11-12 23:58:04,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958558195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:58:04,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [317162416] [2021-11-12 23:58:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:58:04,647 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:58:04,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:58:04,649 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:58:04,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 23:58:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:58:08,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 3635 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:58:08,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:58:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:58:11,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:58:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:58:14,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [317162416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:58:14,013 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:58:14,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-12 23:58:14,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515200706] [2021-11-12 23:58:14,015 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:58:14,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:58:14,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:58:14,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:58:14,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:58:14,017 INFO L87 Difference]: Start difference. First operand 17633 states and 22449 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) [2021-11-12 23:58:16,559 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:20,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:58:20,601 INFO L93 Difference]: Finished difference Result 35245 states and 45241 transitions. [2021-11-12 23:58:20,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:58:20,602 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 [2021-11-12 23:58:20,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:58:20,668 INFO L225 Difference]: With dead ends: 35245 [2021-11-12 23:58:20,668 INFO L226 Difference]: Without dead ends: 17633 [2021-11-12 23:58:20,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1573 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:58:20,714 INFO L933 BasicCegarLoop]: 1404 mSDtfsCounter, 1219 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4868.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 2301 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.83ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5218.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:58:20,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1219 Valid, 2301 Invalid, 551 Unknown, 0 Unchecked, 10.83ms Time], IncrementalHoareTripleChecker [42 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 5218.78ms Time] [2021-11-12 23:58:20,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17633 states. [2021-11-12 23:58:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17633 to 17633. [2021-11-12 23:58:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17633 states, 12711 states have (on average 1.2172134371803949) internal successors, (15472), 12792 states have internal predecessors, (15472), 3472 states have call successors, (3472), 1449 states have call predecessors, (3472), 1449 states have return successors, (3481), 3424 states have call predecessors, (3481), 3472 states have call successors, (3481) [2021-11-12 23:58:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17633 states to 17633 states and 22425 transitions. [2021-11-12 23:58:21,821 INFO L78 Accepts]: Start accepts. Automaton has 17633 states and 22425 transitions. Word has length 397 [2021-11-12 23:58:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:58:21,823 INFO L470 AbstractCegarLoop]: Abstraction has 17633 states and 22425 transitions. [2021-11-12 23:58:21,823 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) [2021-11-12 23:58:21,823 INFO L276 IsEmpty]: Start isEmpty. Operand 17633 states and 22425 transitions. [2021-11-12 23:58:21,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-11-12 23:58:21,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:58:21,831 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] [2021-11-12 23:58:21,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:58:22,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-12 23:58:22,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:58:22,245 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:58:22,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:58:22,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1228483080, now seen corresponding path program 1 times [2021-11-12 23:58:22,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:58:22,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257098061] [2021-11-12 23:58:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:58:22,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:58:22,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:58:22,251 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:58:22,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:58:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:58:33,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:58:33,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:58:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-12 23:58:34,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:58:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-12 23:58:35,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:58:35,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257098061] [2021-11-12 23:58:35,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257098061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:58:35,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2009937580] [2021-11-12 23:58:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:58:35,218 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:58:35,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:58:35,219 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:58:35,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:58:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:58:38,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:58:38,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:58:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:58:41,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:58:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:58:42,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2009937580] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:58:42,965 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:58:42,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-12 23:58:42,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236075073] [2021-11-12 23:58:42,966 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:58:42,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:58:42,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:58:42,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:58:42,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:58:42,968 INFO L87 Difference]: Start difference. First operand 17633 states and 22425 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) [2021-11-12 23:58:45,469 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:58:49,122 INFO L93 Difference]: Finished difference Result 35245 states and 45193 transitions. [2021-11-12 23:58:49,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:58:49,122 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 [2021-11-12 23:58:49,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:58:49,179 INFO L225 Difference]: With dead ends: 35245 [2021-11-12 23:58:49,179 INFO L226 Difference]: Without dead ends: 17633 [2021-11-12 23:58:49,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1588 GetRequests, 1577 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:58:49,219 INFO L933 BasicCegarLoop]: 1403 mSDtfsCounter, 1974 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 474 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4723.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1974 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.75ms SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5040.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:58:49,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1974 Valid, 2299 Invalid, 983 Unknown, 0 Unchecked, 10.75ms Time], IncrementalHoareTripleChecker [474 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 5040.06ms Time] [2021-11-12 23:58:49,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17633 states. [2021-11-12 23:58:50,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17633 to 17633. [2021-11-12 23:58:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17633 states, 12711 states have (on average 1.2153253087876643) internal successors, (15448), 12792 states have internal predecessors, (15448), 3472 states have call successors, (3472), 1449 states have call predecessors, (3472), 1449 states have return successors, (3481), 3424 states have call predecessors, (3481), 3472 states have call successors, (3481) [2021-11-12 23:58:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17633 states to 17633 states and 22401 transitions. [2021-11-12 23:58:50,502 INFO L78 Accepts]: Start accepts. Automaton has 17633 states and 22401 transitions. Word has length 398 [2021-11-12 23:58:50,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:58:50,503 INFO L470 AbstractCegarLoop]: Abstraction has 17633 states and 22401 transitions. [2021-11-12 23:58:50,503 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) [2021-11-12 23:58:50,503 INFO L276 IsEmpty]: Start isEmpty. Operand 17633 states and 22401 transitions. [2021-11-12 23:58:50,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-11-12 23:58:50,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:58:50,509 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] [2021-11-12 23:58:50,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:58:50,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-12 23:58:50,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:58:50,924 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:58:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:58:50,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1943340045, now seen corresponding path program 1 times [2021-11-12 23:58:50,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:58:50,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018433729] [2021-11-12 23:58:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:58:50,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:58:50,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:58:50,932 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:58:50,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:59:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:59:03,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:59:03,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:59:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-12 23:59:04,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:59:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-12 23:59:05,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:59:05,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018433729] [2021-11-12 23:59:05,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018433729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:59:05,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2033497211] [2021-11-12 23:59:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:59:05,785 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:59:05,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:59:05,786 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:59:05,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 23:59:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:59:09,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:59:09,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:59:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:59:13,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:59:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:59:15,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2033497211] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:59:15,332 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:59:15,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-12 23:59:15,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071211542] [2021-11-12 23:59:15,333 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:59:15,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:59:15,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:59:15,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:59:15,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:59:15,335 INFO L87 Difference]: Start difference. First operand 17633 states and 22401 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) [2021-11-12 23:59:17,932 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:59:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:59:22,137 INFO L93 Difference]: Finished difference Result 35245 states and 45145 transitions. [2021-11-12 23:59:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:59:22,138 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 [2021-11-12 23:59:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:59:22,185 INFO L225 Difference]: With dead ends: 35245 [2021-11-12 23:59:22,185 INFO L226 Difference]: Without dead ends: 17633 [2021-11-12 23:59:22,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1592 GetRequests, 1581 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:59:22,221 INFO L933 BasicCegarLoop]: 1402 mSDtfsCounter, 1217 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4997.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 2297 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.47ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5352.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:59:22,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 2297 Invalid, 551 Unknown, 0 Unchecked, 10.47ms Time], IncrementalHoareTripleChecker [42 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 5352.33ms Time] [2021-11-12 23:59:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17633 states. [2021-11-12 23:59:23,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17633 to 17633. [2021-11-12 23:59:23,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17633 states, 12711 states have (on average 1.2134371803949335) internal successors, (15424), 12792 states have internal predecessors, (15424), 3472 states have call successors, (3472), 1449 states have call predecessors, (3472), 1449 states have return successors, (3481), 3424 states have call predecessors, (3481), 3472 states have call successors, (3481) [2021-11-12 23:59:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17633 states to 17633 states and 22377 transitions. [2021-11-12 23:59:23,866 INFO L78 Accepts]: Start accepts. Automaton has 17633 states and 22377 transitions. Word has length 399 [2021-11-12 23:59:23,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:59:23,868 INFO L470 AbstractCegarLoop]: Abstraction has 17633 states and 22377 transitions. [2021-11-12 23:59:23,868 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) [2021-11-12 23:59:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 17633 states and 22377 transitions. [2021-11-12 23:59:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-11-12 23:59:23,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:59:23,878 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] [2021-11-12 23:59:23,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:59:24,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:59:24,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:59:24,292 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:59:24,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:59:24,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1371092508, now seen corresponding path program 1 times [2021-11-12 23:59:24,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:59:24,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540429506] [2021-11-12 23:59:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:59:24,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:59:24,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:59:24,300 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:59:24,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:59:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:59:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 3638 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:59:38,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:59:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-12 23:59:39,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:59:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-12 23:59:40,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:59:40,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540429506] [2021-11-12 23:59:40,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540429506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:59:40,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1848417911] [2021-11-12 23:59:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:59:40,464 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:59:40,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:59:40,465 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:59:40,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-12 23:59:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:59:44,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 3638 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:59:44,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:59:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:59:47,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:59:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-12 23:59:50,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1848417911] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:59:50,179 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:59:50,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-12 23:59:50,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225800570] [2021-11-12 23:59:50,180 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:59:50,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:59:50,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:59:50,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:59:50,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:59:50,183 INFO L87 Difference]: Start difference. First operand 17633 states and 22377 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) [2021-11-12 23:59:52,682 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:59:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:59:57,075 INFO L93 Difference]: Finished difference Result 35245 states and 45097 transitions. [2021-11-12 23:59:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:59:57,077 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 [2021-11-12 23:59:57,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:59:57,139 INFO L225 Difference]: With dead ends: 35245 [2021-11-12 23:59:57,140 INFO L226 Difference]: Without dead ends: 17633 [2021-11-12 23:59:57,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1596 GetRequests, 1585 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:59:57,183 INFO L933 BasicCegarLoop]: 1401 mSDtfsCounter, 1968 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 474 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4991.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1968 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.23ms SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5371.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:59:57,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1968 Valid, 2295 Invalid, 983 Unknown, 0 Unchecked, 12.23ms Time], IncrementalHoareTripleChecker [474 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 5371.49ms Time] [2021-11-12 23:59:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17633 states. [2021-11-12 23:59:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17633 to 17633. [2021-11-12 23:59:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17633 states, 12711 states have (on average 1.2115490520022028) internal successors, (15400), 12792 states have internal predecessors, (15400), 3472 states have call successors, (3472), 1449 states have call predecessors, (3472), 1449 states have return successors, (3481), 3424 states have call predecessors, (3481), 3472 states have call successors, (3481) [2021-11-12 23:59:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17633 states to 17633 states and 22353 transitions. [2021-11-12 23:59:58,774 INFO L78 Accepts]: Start accepts. Automaton has 17633 states and 22353 transitions. Word has length 400 [2021-11-12 23:59:58,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:59:58,775 INFO L470 AbstractCegarLoop]: Abstraction has 17633 states and 22353 transitions. [2021-11-12 23:59:58,775 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) [2021-11-12 23:59:58,775 INFO L276 IsEmpty]: Start isEmpty. Operand 17633 states and 22353 transitions. [2021-11-12 23:59:58,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2021-11-12 23:59:58,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:59:58,782 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] [2021-11-12 23:59:58,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:59:59,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-12 23:59:59,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:59:59,183 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:59:59,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:59:59,184 INFO L85 PathProgramCache]: Analyzing trace with hash -696771441, now seen corresponding path program 1 times [2021-11-12 23:59:59,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:59:59,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565050028] [2021-11-12 23:59:59,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:59:59,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:59:59,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:59:59,193 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:59:59,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 00:00:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:00:13,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 3639 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 00:00:13,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:00:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-13 00:00:14,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:00:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-13 00:00:15,088 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 00:00:15,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565050028] [2021-11-13 00:00:15,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565050028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 00:00:15,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [948811770] [2021-11-13 00:00:15,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:00:15,089 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 00:00:15,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 00:00:15,089 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 00:00:15,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-13 00:00:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:00:18,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 3639 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 00:00:18,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:00:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-13 00:00:22,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:00:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-13 00:00:24,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [948811770] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 00:00:24,814 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 00:00:24,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-13 00:00:24,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586753528] [2021-11-13 00:00:24,815 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 00:00:24,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 00:00:24,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 00:00:24,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 00:00:24,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 00:00:24,817 INFO L87 Difference]: Start difference. First operand 17633 states and 22353 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) [2021-11-13 00:00:27,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:00:31,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 00:00:31,894 INFO L93 Difference]: Finished difference Result 35245 states and 45049 transitions. [2021-11-13 00:00:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 00:00:31,895 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 [2021-11-13 00:00:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 00:00:31,964 INFO L225 Difference]: With dead ends: 35245 [2021-11-13 00:00:31,964 INFO L226 Difference]: Without dead ends: 17633 [2021-11-13 00:00:32,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1600 GetRequests, 1589 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 00:00:32,022 INFO L933 BasicCegarLoop]: 1400 mSDtfsCounter, 1965 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 474 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5006.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1965 SdHoareTripleChecker+Valid, 2293 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.95ms SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5395.15ms IncrementalHoareTripleChecker+Time [2021-11-13 00:00:32,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1965 Valid, 2293 Invalid, 983 Unknown, 0 Unchecked, 11.95ms Time], IncrementalHoareTripleChecker [474 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 5395.15ms Time] [2021-11-13 00:00:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17633 states. [2021-11-13 00:00:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17633 to 17633. [2021-11-13 00:00:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17633 states, 12711 states have (on average 1.2096609236094722) internal successors, (15376), 12792 states have internal predecessors, (15376), 3472 states have call successors, (3472), 1449 states have call predecessors, (3472), 1449 states have return successors, (3481), 3424 states have call predecessors, (3481), 3472 states have call successors, (3481) [2021-11-13 00:00:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17633 states to 17633 states and 22329 transitions. [2021-11-13 00:00:33,634 INFO L78 Accepts]: Start accepts. Automaton has 17633 states and 22329 transitions. Word has length 401 [2021-11-13 00:00:33,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 00:00:33,635 INFO L470 AbstractCegarLoop]: Abstraction has 17633 states and 22329 transitions. [2021-11-13 00:00:33,635 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) [2021-11-13 00:00:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 17633 states and 22329 transitions. [2021-11-13 00:00:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-11-13 00:00:33,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 00:00:33,642 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] [2021-11-13 00:00:33,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-13 00:00:33,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-13 00:00:34,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 00:00:34,043 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 00:00:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 00:00:34,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1153138240, now seen corresponding path program 1 times [2021-11-13 00:00:34,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 00:00:34,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904393247] [2021-11-13 00:00:34,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:00:34,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 00:00:34,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 00:00:34,051 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 00:00:34,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 00:00:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:00:48,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 3640 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 00:00:48,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:00:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-13 00:00:49,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:00:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-13 00:00:50,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 00:00:50,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904393247] [2021-11-13 00:00:50,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904393247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 00:00:50,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1939326370] [2021-11-13 00:00:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:00:50,075 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 00:00:50,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 00:00:50,076 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 00:00:50,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-13 00:00:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:00:53,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 3640 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 00:00:53,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:00:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-13 00:00:57,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:00:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-13 00:00:59,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1939326370] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 00:00:59,708 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 00:00:59,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-13 00:00:59,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496307454] [2021-11-13 00:00:59,709 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 00:00:59,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 00:00:59,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 00:00:59,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 00:00:59,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 00:00:59,711 INFO L87 Difference]: Start difference. First operand 17633 states and 22329 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) [2021-11-13 00:01:02,208 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 00:01:06,783 INFO L93 Difference]: Finished difference Result 35245 states and 45001 transitions. [2021-11-13 00:01:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 00:01:06,784 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 [2021-11-13 00:01:06,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 00:01:06,854 INFO L225 Difference]: With dead ends: 35245 [2021-11-13 00:01:06,855 INFO L226 Difference]: Without dead ends: 17633 [2021-11-13 00:01:06,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1604 GetRequests, 1593 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 00:01:06,918 INFO L933 BasicCegarLoop]: 1399 mSDtfsCounter, 1214 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4935.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 2291 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.62ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5294.68ms IncrementalHoareTripleChecker+Time [2021-11-13 00:01:06,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1214 Valid, 2291 Invalid, 551 Unknown, 0 Unchecked, 9.62ms Time], IncrementalHoareTripleChecker [42 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 5294.68ms Time] [2021-11-13 00:01:06,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17633 states. [2021-11-13 00:01:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17633 to 17633. [2021-11-13 00:01:08,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17633 states, 12711 states have (on average 1.2077727952167414) internal successors, (15352), 12792 states have internal predecessors, (15352), 3472 states have call successors, (3472), 1449 states have call predecessors, (3472), 1449 states have return successors, (3481), 3424 states have call predecessors, (3481), 3472 states have call successors, (3481) [2021-11-13 00:01:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17633 states to 17633 states and 22305 transitions. [2021-11-13 00:01:08,607 INFO L78 Accepts]: Start accepts. Automaton has 17633 states and 22305 transitions. Word has length 402 [2021-11-13 00:01:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 00:01:08,608 INFO L470 AbstractCegarLoop]: Abstraction has 17633 states and 22305 transitions. [2021-11-13 00:01:08,608 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) [2021-11-13 00:01:08,608 INFO L276 IsEmpty]: Start isEmpty. Operand 17633 states and 22305 transitions. [2021-11-13 00:01:08,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-11-13 00:01:08,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 00:01:08,615 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] [2021-11-13 00:01:08,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-13 00:01:08,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-13 00:01:09,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 00:01:09,016 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 00:01:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 00:01:09,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1993876779, now seen corresponding path program 1 times [2021-11-13 00:01:09,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 00:01:09,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293032620] [2021-11-13 00:01:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:01:09,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 00:01:09,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 00:01:09,176 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 00:01:09,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-13 00:01:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:01:23,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 3641 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 00:01:23,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:01:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-13 00:01:24,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:01:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-13 00:01:25,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 00:01:25,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293032620] [2021-11-13 00:01:25,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293032620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 00:01:25,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [821002254] [2021-11-13 00:01:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:01:25,323 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 00:01:25,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 00:01:25,324 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 00:01:25,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-13 00:01:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:01:28,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 3641 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 00:01:28,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:01:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-13 00:01:32,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:01:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-13 00:01:35,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [821002254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 00:01:35,055 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 00:01:35,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [6, 6] total 13 [2021-11-13 00:01:35,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079225801] [2021-11-13 00:01:35,056 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 00:01:35,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 00:01:35,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 00:01:35,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 00:01:35,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 00:01:35,057 INFO L87 Difference]: Start difference. First operand 17633 states and 22305 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) [2021-11-13 00:01:37,705 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.64s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 00:01:42,438 INFO L93 Difference]: Finished difference Result 35245 states and 44953 transitions. [2021-11-13 00:01:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 00:01:42,439 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 [2021-11-13 00:01:42,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 00:01:42,482 INFO L225 Difference]: With dead ends: 35245 [2021-11-13 00:01:42,482 INFO L226 Difference]: Without dead ends: 17633 [2021-11-13 00:01:42,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1608 GetRequests, 1597 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 00:01:42,514 INFO L933 BasicCegarLoop]: 1398 mSDtfsCounter, 1959 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 474 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5159.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 2289 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.81ms SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5534.70ms IncrementalHoareTripleChecker+Time [2021-11-13 00:01:42,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1959 Valid, 2289 Invalid, 983 Unknown, 0 Unchecked, 10.81ms Time], IncrementalHoareTripleChecker [474 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 5534.70ms Time] [2021-11-13 00:01:42,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17633 states. [2021-11-13 00:01:44,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17633 to 17633. [2021-11-13 00:01:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17633 states, 12711 states have (on average 1.2058846668240106) internal successors, (15328), 12792 states have internal predecessors, (15328), 3472 states have call successors, (3472), 1449 states have call predecessors, (3472), 1449 states have return successors, (3481), 3424 states have call predecessors, (3481), 3472 states have call successors, (3481) [2021-11-13 00:01:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17633 states to 17633 states and 22281 transitions. [2021-11-13 00:01:44,252 INFO L78 Accepts]: Start accepts. Automaton has 17633 states and 22281 transitions. Word has length 403 [2021-11-13 00:01:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 00:01:44,253 INFO L470 AbstractCegarLoop]: Abstraction has 17633 states and 22281 transitions. [2021-11-13 00:01:44,253 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) [2021-11-13 00:01:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 17633 states and 22281 transitions. [2021-11-13 00:01:44,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-11-13 00:01:44,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 00:01:44,259 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] [2021-11-13 00:01:44,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-13 00:01:44,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-13 00:01:44,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 00:01:44,660 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 00:01:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 00:01:44,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2022505930, now seen corresponding path program 1 times [2021-11-13 00:01:44,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 00:01:44,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20640570] [2021-11-13 00:01:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:01:44,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 00:01:44,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 00:01:44,670 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 00:01:44,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-13 00:01:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:01:58,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 3641 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 00:01:58,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:01:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-13 00:01:59,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:02:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-13 00:02:00,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 00:02:00,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20640570] [2021-11-13 00:02:00,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20640570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 00:02:00,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [656495747] [2021-11-13 00:02:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:02:00,613 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 00:02:00,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 00:02:00,613 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 00:02:00,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-13 00:02:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:02:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 3641 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 00:02:04,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:02:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-13 00:02:05,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:02:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2021-11-13 00:02:05,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [656495747] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 00:02:05,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318848512] [2021-11-13 00:02:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:02:05,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 00:02:05,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 00:02:05,946 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 00:02:05,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-13 00:02:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:02:10,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 3641 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 00:02:10,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:02:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 24 proven. 76 refuted. 0 times theorem prover too weak. 927 trivial. 0 not checked. [2021-11-13 00:02:11,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:02:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-13 00:02:12,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318848512] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 00:02:12,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-13 00:02:12,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 6, 6, 8] total 17 [2021-11-13 00:02:12,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996344655] [2021-11-13 00:02:12,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 00:02:12,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 00:02:12,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 00:02:12,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 00:02:12,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-13 00:02:12,430 INFO L87 Difference]: Start difference. First operand 17633 states and 22281 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) [2021-11-13 00:02:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 00:02:14,278 INFO L93 Difference]: Finished difference Result 17713 states and 22546 transitions. [2021-11-13 00:02:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 00:02:14,279 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 [2021-11-13 00:02:14,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 00:02:14,321 INFO L225 Difference]: With dead ends: 17713 [2021-11-13 00:02:14,321 INFO L226 Difference]: Without dead ends: 17711 [2021-11-13 00:02:14,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2412 GetRequests, 2397 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-13 00:02:14,327 INFO L933 BasicCegarLoop]: 1412 mSDtfsCounter, 3 mSDsluCounter, 4231 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5643 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.07ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.44ms IncrementalHoareTripleChecker+Time [2021-11-13 00:02:14,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 5643 Invalid, 10 Unknown, 0 Unchecked, 17.07ms Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 35.44ms Time] [2021-11-13 00:02:14,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17711 states. [2021-11-13 00:02:16,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17711 to 17633. [2021-11-13 00:02:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17633 states, 12711 states have (on average 1.20399653843128) internal successors, (15304), 12792 states have internal predecessors, (15304), 3472 states have call successors, (3472), 1449 states have call predecessors, (3472), 1449 states have return successors, (3481), 3424 states have call predecessors, (3481), 3472 states have call successors, (3481) [2021-11-13 00:02:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17633 states to 17633 states and 22257 transitions. [2021-11-13 00:02:16,189 INFO L78 Accepts]: Start accepts. Automaton has 17633 states and 22257 transitions. Word has length 403 [2021-11-13 00:02:16,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 00:02:16,190 INFO L470 AbstractCegarLoop]: Abstraction has 17633 states and 22257 transitions. [2021-11-13 00:02:16,190 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) [2021-11-13 00:02:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 17633 states and 22257 transitions. [2021-11-13 00:02:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2021-11-13 00:02:16,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 00:02:16,227 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] [2021-11-13 00:02:16,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-13 00:02:16,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-13 00:02:16,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-13 00:02:16,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 00:02:16,828 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 00:02:16,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 00:02:16,829 INFO L85 PathProgramCache]: Analyzing trace with hash 972469051, now seen corresponding path program 1 times [2021-11-13 00:02:16,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 00:02:16,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274452494] [2021-11-13 00:02:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:02:16,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 00:02:16,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 00:02:16,838 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 00:02:16,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-13 00:02:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:02:34,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 5128 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 00:02:34,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:02:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 1371 proven. 8 refuted. 0 times theorem prover too weak. 1911 trivial. 0 not checked. [2021-11-13 00:02:37,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:02:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 3261 trivial. 0 not checked. [2021-11-13 00:02:40,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 00:02:40,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274452494] [2021-11-13 00:02:40,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274452494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 00:02:40,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1306989921] [2021-11-13 00:02:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:02:40,266 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 00:02:40,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 00:02:40,267 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 00:02:40,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-13 00:02:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:02:44,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 5128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 00:02:44,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:02:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 506 proven. 0 refuted. 0 times theorem prover too weak. 2784 trivial. 0 not checked. [2021-11-13 00:02:46,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:02:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3269 trivial. 0 not checked. [2021-11-13 00:02:49,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1306989921] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 00:02:49,099 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 00:02:49,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-13 00:02:49,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934582885] [2021-11-13 00:02:49,102 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 00:02:49,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 00:02:49,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 00:02:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 00:02:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 00:02:49,106 INFO L87 Difference]: Start difference. First operand 17633 states and 22257 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) [2021-11-13 00:02:51,847 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.73s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:02:54,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 00:02:54,418 INFO L93 Difference]: Finished difference Result 41749 states and 52822 transitions. [2021-11-13 00:02:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 00:02:54,418 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 [2021-11-13 00:02:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 00:02:54,491 INFO L225 Difference]: With dead ends: 41749 [2021-11-13 00:02:54,491 INFO L226 Difference]: Without dead ends: 24137 [2021-11-13 00:02:54,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3520 GetRequests, 3511 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 00:02:54,527 INFO L933 BasicCegarLoop]: 2522 mSDtfsCounter, 1113 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2903.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 3882 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.32ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3037.33ms IncrementalHoareTripleChecker+Time [2021-11-13 00:02:54,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 3882 Invalid, 45 Unknown, 0 Unchecked, 8.32ms Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 3037.33ms Time] [2021-11-13 00:02:54,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24137 states. [2021-11-13 00:02:57,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24137 to 24131. [2021-11-13 00:02:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24131 states, 17456 states have (on average 1.2055453712190651) internal successors, (21044), 17564 states have internal predecessors, (21044), 4733 states have call successors, (4733), 1941 states have call predecessors, (4733), 1941 states have return successors, (4751), 4658 states have call predecessors, (4751), 4733 states have call successors, (4751) [2021-11-13 00:02:57,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24131 states to 24131 states and 30528 transitions. [2021-11-13 00:02:57,542 INFO L78 Accepts]: Start accepts. Automaton has 24131 states and 30528 transitions. Word has length 881 [2021-11-13 00:02:57,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 00:02:57,548 INFO L470 AbstractCegarLoop]: Abstraction has 24131 states and 30528 transitions. [2021-11-13 00:02:57,548 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) [2021-11-13 00:02:57,548 INFO L276 IsEmpty]: Start isEmpty. Operand 24131 states and 30528 transitions. [2021-11-13 00:02:57,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2021-11-13 00:02:57,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 00:02:57,688 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 22, 22, 21, 21, 21, 14, 14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-11-13 00:02:57,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-13 00:02:58,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-13 00:02:58,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 00:02:58,089 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 00:02:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 00:02:58,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2004048129, now seen corresponding path program 1 times [2021-11-13 00:02:58,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 00:02:58,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450484946] [2021-11-13 00:02:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:02:58,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 00:02:58,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 00:02:58,099 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 00:02:58,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-13 00:03:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:03:14,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 5193 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 00:03:14,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:03:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3494 backedges. 1457 proven. 8 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2021-11-13 00:03:17,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:03:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3494 backedges. 60 proven. 8 refuted. 0 times theorem prover too weak. 3426 trivial. 0 not checked. [2021-11-13 00:03:19,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 00:03:19,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450484946] [2021-11-13 00:03:19,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450484946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 00:03:19,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1238955975] [2021-11-13 00:03:19,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:03:19,807 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 00:03:19,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 00:03:19,823 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 00:03:19,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-13 00:03:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:03:24,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 5193 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 00:03:24,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:03:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3494 backedges. 675 proven. 0 refuted. 0 times theorem prover too weak. 2819 trivial. 0 not checked. [2021-11-13 00:03:26,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:03:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3494 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 3434 trivial. 0 not checked. [2021-11-13 00:03:30,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1238955975] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 00:03:30,105 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 00:03:30,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [6, 6] total 24 [2021-11-13 00:03:30,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730669313] [2021-11-13 00:03:30,107 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 00:03:30,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 00:03:30,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 00:03:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 00:03:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-11-13 00:03:30,110 INFO L87 Difference]: Start difference. First operand 24131 states and 30528 transitions. Second operand has 16 states, 16 states have (on average 22.75) internal successors, (364), 14 states have internal predecessors, (364), 4 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (116), 6 states have call predecessors, (116), 4 states have call successors, (116) [2021-11-13 00:03:33,692 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:03:44,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:03:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 00:03:47,089 INFO L93 Difference]: Finished difference Result 84934 states and 113149 transitions. [2021-11-13 00:03:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 00:03:47,090 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.75) internal successors, (364), 14 states have internal predecessors, (364), 4 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (116), 6 states have call predecessors, (116), 4 states have call successors, (116) Word has length 908 [2021-11-13 00:03:47,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 00:03:47,528 INFO L225 Difference]: With dead ends: 84934 [2021-11-13 00:03:47,528 INFO L226 Difference]: Without dead ends: 60824 [2021-11-13 00:03:47,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3638 GetRequests, 3610 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-11-13 00:03:47,593 INFO L933 BasicCegarLoop]: 2457 mSDtfsCounter, 5789 mSDsluCounter, 28296 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 1662 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7881.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5995 SdHoareTripleChecker+Valid, 30753 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 56.94ms SdHoareTripleChecker+Time, 1662 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8338.35ms IncrementalHoareTripleChecker+Time [2021-11-13 00:03:47,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5995 Valid, 30753 Invalid, 1909 Unknown, 0 Unchecked, 56.94ms Time], IncrementalHoareTripleChecker [1662 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 8338.35ms Time] [2021-11-13 00:03:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60824 states. [2021-11-13 00:03:52,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60824 to 24266. [2021-11-13 00:03:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24266 states, 17546 states have (on average 1.2050039895132794) internal successors, (21143), 17663 states have internal predecessors, (21143), 4769 states have call successors, (4769), 1941 states have call predecessors, (4769), 1950 states have return successors, (4796), 4697 states have call predecessors, (4796), 4769 states have call successors, (4796) [2021-11-13 00:03:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24266 states to 24266 states and 30708 transitions. [2021-11-13 00:03:52,550 INFO L78 Accepts]: Start accepts. Automaton has 24266 states and 30708 transitions. Word has length 908 [2021-11-13 00:03:52,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 00:03:52,552 INFO L470 AbstractCegarLoop]: Abstraction has 24266 states and 30708 transitions. [2021-11-13 00:03:52,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.75) internal successors, (364), 14 states have internal predecessors, (364), 4 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (116), 6 states have call predecessors, (116), 4 states have call successors, (116) [2021-11-13 00:03:52,552 INFO L276 IsEmpty]: Start isEmpty. Operand 24266 states and 30708 transitions. [2021-11-13 00:03:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2021-11-13 00:03:52,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 00:03:52,607 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] [2021-11-13 00:03:52,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-13 00:03:52,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2021-11-13 00:03:53,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 00:03:53,009 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 00:03:53,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 00:03:53,010 INFO L85 PathProgramCache]: Analyzing trace with hash 58152730, now seen corresponding path program 1 times [2021-11-13 00:03:53,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 00:03:53,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210275049] [2021-11-13 00:03:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:03:53,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 00:03:53,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 00:03:53,026 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 00:03:53,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-13 00:04:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:04:11,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 5427 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 00:04:11,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:04:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3539 backedges. 1472 proven. 8 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-11-13 00:04:15,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:04:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3539 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 3495 trivial. 0 not checked. [2021-11-13 00:04:18,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 00:04:18,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210275049] [2021-11-13 00:04:18,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210275049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 00:04:18,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1223185501] [2021-11-13 00:04:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:04:18,896 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 00:04:18,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 00:04:18,896 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 00:04:18,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-13 00:04:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:04:23,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 5427 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 00:04:23,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:04:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3539 backedges. 836 proven. 0 refuted. 0 times theorem prover too weak. 2703 trivial. 0 not checked. [2021-11-13 00:04:25,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:04:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3539 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 3503 trivial. 0 not checked. [2021-11-13 00:04:28,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1223185501] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 00:04:28,338 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 00:04:28,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-13 00:04:28,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521457445] [2021-11-13 00:04:28,339 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 00:04:28,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 00:04:28,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 00:04:28,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 00:04:28,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 00:04:28,342 INFO L87 Difference]: Start difference. First operand 24266 states and 30708 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) [2021-11-13 00:04:30,822 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:04:33,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 00:04:33,191 INFO L93 Difference]: Finished difference Result 48538 states and 61495 transitions. [2021-11-13 00:04:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 00:04:33,195 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 968 [2021-11-13 00:04:33,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 00:04:33,272 INFO L225 Difference]: With dead ends: 48538 [2021-11-13 00:04:33,272 INFO L226 Difference]: Without dead ends: 24293 [2021-11-13 00:04:33,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3868 GetRequests, 3859 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 00:04:33,318 INFO L933 BasicCegarLoop]: 1398 mSDtfsCounter, 0 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2043.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2792 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.63ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2058.40ms IncrementalHoareTripleChecker+Time [2021-11-13 00:04:33,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2792 Invalid, 5 Unknown, 0 Unchecked, 3.63ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2058.40ms Time] [2021-11-13 00:04:33,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24293 states. [2021-11-13 00:04:36,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24293 to 24293. [2021-11-13 00:04:36,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24293 states, 17573 states have (on average 1.2046890115518125) internal successors, (21170), 17690 states have internal predecessors, (21170), 4769 states have call successors, (4769), 1941 states have call predecessors, (4769), 1950 states have return successors, (4796), 4697 states have call predecessors, (4796), 4769 states have call successors, (4796) [2021-11-13 00:04:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24293 states to 24293 states and 30735 transitions. [2021-11-13 00:04:36,521 INFO L78 Accepts]: Start accepts. Automaton has 24293 states and 30735 transitions. Word has length 968 [2021-11-13 00:04:36,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 00:04:36,522 INFO L470 AbstractCegarLoop]: Abstraction has 24293 states and 30735 transitions. [2021-11-13 00:04:36,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2021-11-13 00:04:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand 24293 states and 30735 transitions. [2021-11-13 00:04:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 971 [2021-11-13 00:04:36,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 00:04:36,566 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 22, 22, 21, 21, 21, 14, 14, 14, 14, 14, 14, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 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] [2021-11-13 00:04:36,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-13 00:04:36,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-13 00:04:36,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 00:04:36,976 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 00:04:36,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 00:04:36,977 INFO L85 PathProgramCache]: Analyzing trace with hash 852221442, now seen corresponding path program 1 times [2021-11-13 00:04:36,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 00:04:36,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597981251] [2021-11-13 00:04:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:04:36,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 00:04:36,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 00:04:36,992 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 00:04:36,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4417b32d-8e08-4479-aa24-50cd1f6c011e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process