./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:50:11,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:50:11,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:50:11,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:50:11,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:50:11,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:50:11,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:50:11,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:50:11,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:50:11,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:50:11,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:50:11,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:50:11,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:50:11,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:50:11,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:50:11,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:50:11,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:50:11,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:50:11,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:50:11,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:50:11,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:50:11,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:50:11,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:50:11,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:50:11,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:50:11,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:50:11,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:50:11,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:50:11,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:50:11,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:50:11,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:50:11,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:50:11,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:50:11,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:50:11,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:50:11,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:50:11,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:50:11,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:50:11,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:50:11,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:50:11,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:50:11,358 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 15:50:11,399 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:50:11,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:50:11,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:50:11,400 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:50:11,401 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:50:11,401 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:50:11,401 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:50:11,401 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:50:11,401 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:50:11,402 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:50:11,403 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:50:11,403 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:50:11,403 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:50:11,403 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:50:11,404 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:50:11,404 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:50:11,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:50:11,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:50:11,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:50:11,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:50:11,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:50:11,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:50:11,406 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:50:11,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:50:11,406 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:50:11,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:50:11,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:50:11,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:50:11,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:50:11,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:50:11,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:50:11,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:50:11,408 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:50:11,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:50:11,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:50:11,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:50:11,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:50:11,409 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_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2021-11-19 15:50:11,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:50:11,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:50:11,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:50:11,684 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:50:11,684 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:50:11,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-19 15:50:11,750 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/data/11b3fc5fa/b671124d69e3473ebc343a89ff0cbe23/FLAG1b8cf86ba [2021-11-19 15:50:12,507 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:50:12,508 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-19 15:50:12,564 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/data/11b3fc5fa/b671124d69e3473ebc343a89ff0cbe23/FLAG1b8cf86ba [2021-11-19 15:50:12,604 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/data/11b3fc5fa/b671124d69e3473ebc343a89ff0cbe23 [2021-11-19 15:50:12,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:50:12,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:50:12,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:12,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:50:12,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:50:12,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:12" (1/1) ... [2021-11-19 15:50:12,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26abf43f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:12, skipping insertion in model container [2021-11-19 15:50:12,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:12" (1/1) ... [2021-11-19 15:50:12,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:50:12,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:13,104 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-19 15:50:13,112 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-19 15:50:13,134 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:50:13,140 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:50:13,922 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:13,923 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:13,923 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:13,924 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:13,926 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:13,940 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:13,941 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:13,943 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:13,944 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:13,946 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:13,947 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:13,948 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:13,948 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:14,320 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:50:14,322 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:50:14,323 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:50:14,324 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:50:14,326 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:50:14,327 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:50:14,328 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:50:14,328 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:50:14,329 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:50:14,330 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:50:14,499 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:50:14,522 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:14,538 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 15:50:14,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b8b1ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:14, skipping insertion in model container [2021-11-19 15:50:14,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:14,539 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:50:14,550 INFO L158 Benchmark]: Toolchain (without parser) took 1928.05ms. Allocated memory is still 144.7MB. Free memory was 105.0MB in the beginning and 85.4MB in the end (delta: 19.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-19 15:50:14,551 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 88.1MB. Free memory was 43.5MB in the beginning and 43.5MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:50:14,552 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1924.66ms. Allocated memory is still 144.7MB. Free memory was 105.0MB in the beginning and 85.4MB in the end (delta: 19.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-19 15:50:14,553 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 88.1MB. Free memory was 43.5MB in the beginning and 43.5MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1924.66ms. Allocated memory is still 144.7MB. Free memory was 105.0MB in the beginning and 85.4MB in the end (delta: 19.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7037]: 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_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:50:16,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:50:16,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:50:16,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:50:16,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:50:16,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:50:16,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:50:16,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:50:16,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:50:16,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:50:16,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:50:16,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:50:16,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:50:16,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:50:16,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:50:16,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:50:16,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:50:16,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:50:16,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:50:16,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:50:16,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:50:16,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:50:16,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:50:16,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:50:16,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:50:16,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:50:16,822 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:50:16,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:50:16,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:50:16,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:50:16,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:50:16,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:50:16,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:50:16,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:50:16,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:50:16,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:50:16,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:50:16,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:50:16,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:50:16,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:50:16,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:50:16,837 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 15:50:16,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:50:16,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:50:16,882 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:50:16,882 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:50:16,882 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:50:16,882 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:50:16,883 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:50:16,883 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:50:16,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:50:16,884 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:50:16,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:50:16,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:50:16,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:50:16,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:50:16,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:50:16,887 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:50:16,888 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:50:16,888 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:50:16,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:50:16,889 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:50:16,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:50:16,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:50:16,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:50:16,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:50:16,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:50:16,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:50:16,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:50:16,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:50:16,891 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:50:16,892 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:16,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:50:16,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:50:16,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:50:16,893 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_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2021-11-19 15:50:17,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:50:17,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:50:17,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:50:17,352 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:50:17,352 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:50:17,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-19 15:50:17,421 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/data/0121c748d/e529a3f5616a47858e298da14800a3c4/FLAG27805f045 [2021-11-19 15:50:18,290 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:50:18,291 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-19 15:50:18,342 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/data/0121c748d/e529a3f5616a47858e298da14800a3c4/FLAG27805f045 [2021-11-19 15:50:18,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/data/0121c748d/e529a3f5616a47858e298da14800a3c4 [2021-11-19 15:50:18,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:50:18,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:50:18,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:18,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:50:18,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:50:18,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:18" (1/1) ... [2021-11-19 15:50:18,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d438721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:18, skipping insertion in model container [2021-11-19 15:50:18,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:18" (1/1) ... [2021-11-19 15:50:18,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:50:18,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:19,261 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-19 15:50:19,269 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-19 15:50:19,295 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:50:19,302 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:50:20,042 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,043 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,043 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,044 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,045 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,061 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,062 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,064 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,065 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,067 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,072 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,073 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,074 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,474 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:50:20,476 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:50:20,477 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:50:20,478 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:50:20,480 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:50:20,481 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:50:20,481 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:50:20,482 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:50:20,483 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:50:20,484 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:50:20,644 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:50:20,685 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:20,713 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:50:20,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:20,771 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-19 15:50:20,775 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-19 15:50:20,777 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:50:20,777 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:50:20,864 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,871 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,871 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,872 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,873 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,885 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,887 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,888 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,889 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,894 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,895 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,895 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,899 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,981 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:50:20,982 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:50:20,982 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:50:20,983 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:50:20,989 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:50:20,990 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:50:20,991 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:50:20,991 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:50:20,992 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:50:20,993 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:50:21,029 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:50:21,056 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:21,075 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:50:21,098 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-19 15:50:21,105 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-19 15:50:21,107 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:50:21,108 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:50:21,154 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:21,154 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:21,154 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:21,155 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:21,155 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:21,166 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:21,169 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:21,171 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:21,172 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:21,172 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:21,173 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:21,173 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:21,174 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:21,238 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:50:21,239 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:50:21,240 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:50:21,240 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:50:21,241 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:50:21,242 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:50:21,243 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:50:21,244 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:50:21,244 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:50:21,245 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:50:21,276 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:50:21,294 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:21,571 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:50:21,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:21 WrapperNode [2021-11-19 15:50:21,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:21,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:50:21,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:50:21,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:50:21,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:21" (1/1) ... [2021-11-19 15:50:21,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:21" (1/1) ... [2021-11-19 15:50:21,744 INFO L137 Inliner]: procedures = 700, calls = 1047, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 134 [2021-11-19 15:50:21,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:50:21,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:50:21,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:50:21,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:50:21,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:21" (1/1) ... [2021-11-19 15:50:21,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:21" (1/1) ... [2021-11-19 15:50:21,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:21" (1/1) ... [2021-11-19 15:50:21,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:21" (1/1) ... [2021-11-19 15:50:21,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:21" (1/1) ... [2021-11-19 15:50:21,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:21" (1/1) ... [2021-11-19 15:50:21,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:21" (1/1) ... [2021-11-19 15:50:21,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:50:21,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:50:21,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:50:21,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:50:21,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:21" (1/1) ... [2021-11-19 15:50:21,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:50:21,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:50:21,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:50:21,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:50:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 15:50:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:50:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 15:50:21,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 15:50:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-19 15:50:21,939 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-19 15:50:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 15:50:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-19 15:50:21,939 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-19 15:50:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:50:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 15:50:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_front [2021-11-19 15:50:21,940 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_front [2021-11-19 15:50:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:50:21,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:50:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-19 15:50:21,941 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-19 15:50:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 15:50:21,941 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 15:50:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 15:50:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 15:50:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 15:50:21,941 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-19 15:50:21,941 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-19 15:50:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-19 15:50:21,942 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-19 15:50:22,243 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:50:22,245 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:50:22,642 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:50:22,649 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:50:22,656 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 15:50:22,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:50:22 BoogieIcfgContainer [2021-11-19 15:50:22,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:50:22,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:50:22,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:50:22,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:50:22,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:50:18" (1/3) ... [2021-11-19 15:50:22,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c782d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:50:22, skipping insertion in model container [2021-11-19 15:50:22,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:21" (2/3) ... [2021-11-19 15:50:22,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c782d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:50:22, skipping insertion in model container [2021-11-19 15:50:22,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:50:22" (3/3) ... [2021-11-19 15:50:22,666 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2021-11-19 15:50:22,673 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:50:22,673 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:50:22,727 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:50:22,738 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 15:50:22,741 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:50:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-19 15:50:22,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 15:50:22,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:22,794 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 15:50:22,794 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:22,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1286081961, now seen corresponding path program 1 times [2021-11-19 15:50:22,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:22,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674111933] [2021-11-19 15:50:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:22,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:22,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:22,824 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:22,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:50:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:23,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 15:50:23,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 15:50:23,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 15:50:23,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:23,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674111933] [2021-11-19 15:50:23,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674111933] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:23,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:23,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 15:50:23,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583304766] [2021-11-19 15:50:23,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:23,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 15:50:23,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:23,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 15:50:23,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:50:23,656 INFO L87 Difference]: Start difference. First operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 15:50:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:23,706 INFO L93 Difference]: Finished difference Result 188 states and 271 transitions. [2021-11-19 15:50:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 15:50:23,708 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 84 [2021-11-19 15:50:23,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:23,717 INFO L225 Difference]: With dead ends: 188 [2021-11-19 15:50:23,721 INFO L226 Difference]: Without dead ends: 93 [2021-11-19 15:50:23,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:50:23,731 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:23,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:50:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-19 15:50:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-19 15:50:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-19 15:50:23,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-11-19 15:50:23,795 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 84 [2021-11-19 15:50:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:23,796 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-11-19 15:50:23,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 15:50:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-11-19 15:50:23,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 15:50:23,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:23,801 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 15:50:23,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 15:50:24,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:24,002 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:24,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:24,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1287183985, now seen corresponding path program 1 times [2021-11-19 15:50:24,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:24,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452001405] [2021-11-19 15:50:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:24,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:24,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:24,006 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:24,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:50:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:24,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:50:24,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:50:24,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-19 15:50:24,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:24,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452001405] [2021-11-19 15:50:24,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452001405] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:24,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:24,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-19 15:50:24,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166925991] [2021-11-19 15:50:24,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:24,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:50:24,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:24,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:50:24,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:50:24,742 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 15:50:24,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:24,868 INFO L93 Difference]: Finished difference Result 169 states and 224 transitions. [2021-11-19 15:50:24,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:50:24,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 84 [2021-11-19 15:50:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:24,874 INFO L225 Difference]: With dead ends: 169 [2021-11-19 15:50:24,874 INFO L226 Difference]: Without dead ends: 95 [2021-11-19 15:50:24,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:50:24,880 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 2 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:24,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 563 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:50:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-19 15:50:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-19 15:50:24,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 63 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-19 15:50:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2021-11-19 15:50:24,911 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 84 [2021-11-19 15:50:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:24,912 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2021-11-19 15:50:24,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 15:50:24,912 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2021-11-19 15:50:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 15:50:24,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:24,923 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 15:50:24,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:25,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:25,138 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:25,138 INFO L85 PathProgramCache]: Analyzing trace with hash 415994251, now seen corresponding path program 1 times [2021-11-19 15:50:25,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:25,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446687801] [2021-11-19 15:50:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:25,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:25,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:25,145 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:25,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:50:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:25,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:50:25,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 15:50:25,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 15:50:26,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:26,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446687801] [2021-11-19 15:50:26,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446687801] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:26,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:26,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2021-11-19 15:50:26,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454511591] [2021-11-19 15:50:26,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:26,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:50:26,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:26,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:50:26,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:50:26,072 INFO L87 Difference]: Start difference. First operand 95 states and 125 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 15:50:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:26,344 INFO L93 Difference]: Finished difference Result 174 states and 231 transitions. [2021-11-19 15:50:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:50:26,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 86 [2021-11-19 15:50:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:26,347 INFO L225 Difference]: With dead ends: 174 [2021-11-19 15:50:26,347 INFO L226 Difference]: Without dead ends: 95 [2021-11-19 15:50:26,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:50:26,349 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 50 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:26,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 663 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:50:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-19 15:50:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-19 15:50:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 63 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-19 15:50:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 124 transitions. [2021-11-19 15:50:26,362 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 124 transitions. Word has length 86 [2021-11-19 15:50:26,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:26,369 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 124 transitions. [2021-11-19 15:50:26,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 15:50:26,370 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 124 transitions. [2021-11-19 15:50:26,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 15:50:26,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:26,371 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 15:50:26,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:26,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:26,572 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:26,573 INFO L85 PathProgramCache]: Analyzing trace with hash 426166840, now seen corresponding path program 1 times [2021-11-19 15:50:26,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:26,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046582239] [2021-11-19 15:50:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:26,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:26,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:26,576 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:26,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:50:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:26,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:50:26,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 15:50:27,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 15:50:27,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:27,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046582239] [2021-11-19 15:50:27,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046582239] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:27,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:27,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 12 [2021-11-19 15:50:27,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756921229] [2021-11-19 15:50:27,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:27,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:50:27,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:27,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:50:27,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:50:27,539 INFO L87 Difference]: Start difference. First operand 95 states and 124 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 15:50:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:27,913 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2021-11-19 15:50:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:50:27,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2021-11-19 15:50:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:27,920 INFO L225 Difference]: With dead ends: 183 [2021-11-19 15:50:27,920 INFO L226 Difference]: Without dead ends: 103 [2021-11-19 15:50:27,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:50:27,927 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 76 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:27,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 752 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:50:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-19 15:50:27,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2021-11-19 15:50:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 64 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-19 15:50:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2021-11-19 15:50:27,941 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 88 [2021-11-19 15:50:27,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:27,942 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2021-11-19 15:50:27,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 15:50:27,942 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2021-11-19 15:50:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 15:50:27,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:27,944 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 15:50:27,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-19 15:50:28,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:28,157 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:28,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:28,158 INFO L85 PathProgramCache]: Analyzing trace with hash 134211126, now seen corresponding path program 1 times [2021-11-19 15:50:28,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:28,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139858042] [2021-11-19 15:50:28,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:28,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:28,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:28,160 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:28,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:50:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:28,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:50:28,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 15:50:28,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 15:50:28,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:28,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139858042] [2021-11-19 15:50:28,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139858042] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:28,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:28,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3] total 9 [2021-11-19 15:50:28,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213913859] [2021-11-19 15:50:28,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:28,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:50:28,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:28,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:50:28,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:50:28,874 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 15:50:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:29,108 INFO L93 Difference]: Finished difference Result 179 states and 240 transitions. [2021-11-19 15:50:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:50:29,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 89 [2021-11-19 15:50:29,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:29,114 INFO L225 Difference]: With dead ends: 179 [2021-11-19 15:50:29,114 INFO L226 Difference]: Without dead ends: 102 [2021-11-19 15:50:29,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:50:29,115 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 58 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:29,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 561 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:50:29,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-19 15:50:29,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-11-19 15:50:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 65 states have internal predecessors, (77), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-19 15:50:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2021-11-19 15:50:29,127 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 89 [2021-11-19 15:50:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:29,127 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2021-11-19 15:50:29,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 15:50:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2021-11-19 15:50:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 15:50:29,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:29,129 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 15:50:29,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:29,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:29,329 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:29,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:29,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2072143320, now seen corresponding path program 1 times [2021-11-19 15:50:29,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:29,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486588569] [2021-11-19 15:50:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:29,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:29,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:29,332 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:29,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:50:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:29,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:50:29,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:50:29,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-19 15:50:30,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:30,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486588569] [2021-11-19 15:50:30,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486588569] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:30,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:30,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 15:50:30,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906600087] [2021-11-19 15:50:30,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:30,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:50:30,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:30,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:50:30,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:50:30,012 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 15:50:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:30,104 INFO L93 Difference]: Finished difference Result 178 states and 233 transitions. [2021-11-19 15:50:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:50:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 97 [2021-11-19 15:50:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:30,107 INFO L225 Difference]: With dead ends: 178 [2021-11-19 15:50:30,107 INFO L226 Difference]: Without dead ends: 100 [2021-11-19 15:50:30,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:50:30,109 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 4 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:30,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 681 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:50:30,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-19 15:50:30,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2021-11-19 15:50:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.21875) internal successors, (78), 66 states have internal predecessors, (78), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-19 15:50:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2021-11-19 15:50:30,121 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 97 [2021-11-19 15:50:30,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:30,122 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2021-11-19 15:50:30,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 15:50:30,122 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2021-11-19 15:50:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 15:50:30,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:30,123 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 15:50:30,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:30,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:30,330 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:30,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:30,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1447444667, now seen corresponding path program 1 times [2021-11-19 15:50:30,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:30,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247685980] [2021-11-19 15:50:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:30,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:30,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:30,332 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:30,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:50:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:30,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 15:50:30,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 15:50:31,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-19 15:50:32,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:32,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247685980] [2021-11-19 15:50:32,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247685980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:32,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [337794185] [2021-11-19 15:50:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:32,218 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:32,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:50:32,221 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:50:32,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 15:50:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:32,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:50:32,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 15:50:32,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-19 15:50:33,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [337794185] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:33,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:50:33,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8, 8] total 23 [2021-11-19 15:50:33,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962035503] [2021-11-19 15:50:33,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:33,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:50:33,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:33,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:50:33,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-19 15:50:33,129 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 15:50:33,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:33,299 INFO L93 Difference]: Finished difference Result 183 states and 239 transitions. [2021-11-19 15:50:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:50:33,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 99 [2021-11-19 15:50:33,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:33,301 INFO L225 Difference]: With dead ends: 183 [2021-11-19 15:50:33,301 INFO L226 Difference]: Without dead ends: 104 [2021-11-19 15:50:33,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-11-19 15:50:33,303 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 8 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:33,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 783 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:50:33,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-19 15:50:33,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2021-11-19 15:50:33,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-19 15:50:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2021-11-19 15:50:33,315 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 99 [2021-11-19 15:50:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:33,315 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2021-11-19 15:50:33,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 15:50:33,316 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2021-11-19 15:50:33,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 15:50:33,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:33,317 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 15:50:33,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:33,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-19 15:50:33,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:33,721 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:33,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2113170743, now seen corresponding path program 1 times [2021-11-19 15:50:33,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:33,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541307944] [2021-11-19 15:50:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:33,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:33,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:33,723 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:33,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:50:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:33,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 15:50:33,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:36,608 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_6 (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_6) (_ bv0 64)) (_ bv16 64)))) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_6 (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_6) (_ bv0 64)) v_aws_linked_list_front_~list.base_BEFORE_CALL_6)))) is different from true [2021-11-19 15:50:44,818 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:50:53,193 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:51:01,369 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:51:09,758 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:51:18,037 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:51:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:51:18,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:23,753 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-19 15:51:23,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-19 15:51:23,766 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-19 15:51:23,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-19 15:51:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:51:23,814 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:23,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541307944] [2021-11-19 15:51:23,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541307944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:23,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1663368639] [2021-11-19 15:51:23,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:23,815 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:23,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:51:23,820 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:51:23,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 15:51:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:24,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 15:51:24,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:32,902 WARN L227 SmtUtils]: Spent 8.47s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 15:51:32,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:51:32,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 76 [2021-11-19 15:51:32,949 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-19 15:51:32,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 90 [2021-11-19 15:52:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:52:19,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 15:52:22,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1663368639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:52:22,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905153445] [2021-11-19 15:52:22,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:22,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:52:22,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:52:22,378 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:52:22,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 15:52:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:22,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 15:52:22,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 15:52:36,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:39,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:52:39,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-19 15:52:39,548 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 15:52:39,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-19 15:52:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 15:52:39,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905153445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:52:39,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:52:39,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 16, 9, 14, 9] total 60 [2021-11-19 15:52:39,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891728404] [2021-11-19 15:52:39,710 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:52:39,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-19 15:52:39,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:39,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-19 15:52:39,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=3167, Unknown=7, NotChecked=114, Total=3540 [2021-11-19 15:52:39,715 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand has 60 states, 54 states have (on average 4.388888888888889) internal successors, (237), 54 states have internal predecessors, (237), 24 states have call successors, (56), 12 states have call predecessors, (56), 19 states have return successors, (52), 20 states have call predecessors, (52), 22 states have call successors, (52) [2021-11-19 15:53:29,981 WARN L227 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:53:42,352 WARN L227 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:53:50,738 WARN L227 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:53:59,100 WARN L227 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:54:07,532 WARN L227 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:54:30,094 WARN L227 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:54:45,282 WARN L227 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:54:58,265 WARN L227 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:55:40,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:55:40,530 INFO L93 Difference]: Finished difference Result 347 states and 460 transitions. [2021-11-19 15:55:40,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-19 15:55:40,531 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 54 states have (on average 4.388888888888889) internal successors, (237), 54 states have internal predecessors, (237), 24 states have call successors, (56), 12 states have call predecessors, (56), 19 states have return successors, (52), 20 states have call predecessors, (52), 22 states have call successors, (52) Word has length 100 [2021-11-19 15:55:40,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:55:40,536 INFO L225 Difference]: With dead ends: 347 [2021-11-19 15:55:40,536 INFO L226 Difference]: Without dead ends: 251 [2021-11-19 15:55:40,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 537 SyntacticMatches, 19 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2675 ImplicationChecksByTransitivity, 262.6s TimeCoverageRelationStatistics Valid=591, Invalid=7547, Unknown=56, NotChecked=178, Total=8372 [2021-11-19 15:55:40,542 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 226 mSDsluCounter, 2715 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 2834 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 642 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:55:40,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 2834 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 382 Invalid, 0 Unknown, 642 Unchecked, 2.1s Time] [2021-11-19 15:55:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-19 15:55:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 220. [2021-11-19 15:55:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 163 states have (on average 1.294478527607362) internal successors, (211), 166 states have internal predecessors, (211), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (45), 35 states have call predecessors, (45), 35 states have call successors, (45) [2021-11-19 15:55:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 292 transitions. [2021-11-19 15:55:40,573 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 292 transitions. Word has length 100 [2021-11-19 15:55:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:55:40,574 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 292 transitions. [2021-11-19 15:55:40,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 54 states have (on average 4.388888888888889) internal successors, (237), 54 states have internal predecessors, (237), 24 states have call successors, (56), 12 states have call predecessors, (56), 19 states have return successors, (52), 20 states have call predecessors, (52), 22 states have call successors, (52) [2021-11-19 15:55:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 292 transitions. [2021-11-19 15:55:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 15:55:40,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:55:40,577 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 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] [2021-11-19 15:55:40,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:55:40,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:55:41,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:55:41,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:55:41,181 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:55:41,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:55:41,182 INFO L85 PathProgramCache]: Analyzing trace with hash 2030089748, now seen corresponding path program 1 times [2021-11-19 15:55:41,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:55:41,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288796432] [2021-11-19 15:55:41,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:55:41,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:55:41,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:55:41,184 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:55:41,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:55:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:55:41,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 15:55:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:55:41,590 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-19 15:55:41,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-19 15:55:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-19 15:55:43,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:55:45,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2021-11-19 15:55:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 15:55:45,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:55:45,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288796432] [2021-11-19 15:55:45,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288796432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:55:45,297 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:55:45,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [] total 21 [2021-11-19 15:55:45,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318225362] [2021-11-19 15:55:45,297 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:55:45,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 15:55:45,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:55:45,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 15:55:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:55:45,299 INFO L87 Difference]: Start difference. First operand 220 states and 292 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 19 states have internal predecessors, (104), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-19 15:55:47,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:55:47,880 INFO L93 Difference]: Finished difference Result 559 states and 758 transitions. [2021-11-19 15:55:47,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 15:55:47,882 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 19 states have internal predecessors, (104), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 111 [2021-11-19 15:55:47,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:55:47,886 INFO L225 Difference]: With dead ends: 559 [2021-11-19 15:55:47,887 INFO L226 Difference]: Without dead ends: 462 [2021-11-19 15:55:47,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 190 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-11-19 15:55:47,889 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 110 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:55:47,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 1405 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 569 Invalid, 0 Unknown, 231 Unchecked, 2.2s Time] [2021-11-19 15:55:47,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-19 15:55:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 431. [2021-11-19 15:55:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 328 states have (on average 1.3018292682926829) internal successors, (427), 335 states have internal predecessors, (427), 65 states have call successors, (65), 33 states have call predecessors, (65), 37 states have return successors, (83), 62 states have call predecessors, (83), 64 states have call successors, (83) [2021-11-19 15:55:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 575 transitions. [2021-11-19 15:55:47,942 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 575 transitions. Word has length 111 [2021-11-19 15:55:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:55:47,943 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 575 transitions. [2021-11-19 15:55:47,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 19 states have internal predecessors, (104), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-19 15:55:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 575 transitions. [2021-11-19 15:55:47,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 15:55:47,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:55:47,946 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 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] [2021-11-19 15:55:47,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:55:48,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:55:48,172 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:55:48,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:55:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1637062738, now seen corresponding path program 1 times [2021-11-19 15:55:48,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:55:48,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550808624] [2021-11-19 15:55:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:55:48,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:55:48,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:55:48,174 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:55:48,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:55:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:55:48,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 15:55:48,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:55:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 15:55:51,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:55:55,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:55:55,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-19 15:55:55,171 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 15:55:55,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-19 15:55:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 15:55:55,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:55:55,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550808624] [2021-11-19 15:55:55,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550808624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:55:55,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [557740265] [2021-11-19 15:55:55,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:55:55,262 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:55:55,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:55:55,263 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:55:55,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 15:55:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:55:55,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 15:55:55,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:55:55,906 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-19 15:55:55,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-19 15:55:55,936 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-19 15:55:55,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-19 15:56:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 55 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 15:56:08,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:56:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 15:56:10,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [557740265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:56:10,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916548238] [2021-11-19 15:56:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:56:10,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:56:10,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:56:10,083 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:56:10,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 15:56:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:56:10,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 15:56:10,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:56:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 15:56:12,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:56:15,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:56:15,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-19 15:56:15,318 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 15:56:15,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-19 15:56:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 15:56:15,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916548238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:56:15,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:56:15,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 18, 11, 16, 11] total 40 [2021-11-19 15:56:15,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345195690] [2021-11-19 15:56:15,412 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:56:15,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 15:56:15,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:56:15,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 15:56:15,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 15:56:15,415 INFO L87 Difference]: Start difference. First operand 431 states and 575 transitions. Second operand has 40 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 15 states have call successors, (38), 9 states have call predecessors, (38), 11 states have return successors, (34), 13 states have call predecessors, (34), 14 states have call successors, (34) [2021-11-19 15:56:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:56:18,618 INFO L93 Difference]: Finished difference Result 1181 states and 1607 transitions. [2021-11-19 15:56:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 15:56:18,619 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 15 states have call successors, (38), 9 states have call predecessors, (38), 11 states have return successors, (34), 13 states have call predecessors, (34), 14 states have call successors, (34) Word has length 111 [2021-11-19 15:56:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:56:18,626 INFO L225 Difference]: With dead ends: 1181 [2021-11-19 15:56:18,626 INFO L226 Difference]: Without dead ends: 1063 [2021-11-19 15:56:18,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 590 SyntacticMatches, 33 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=249, Invalid=1821, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 15:56:18,628 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 253 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:56:18,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 2257 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 426 Invalid, 0 Unknown, 348 Unchecked, 2.0s Time] [2021-11-19 15:56:18,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-11-19 15:56:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 931. [2021-11-19 15:56:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 743 states have (on average 1.3283983849259757) internal successors, (987), 764 states have internal predecessors, (987), 110 states have call successors, (110), 61 states have call predecessors, (110), 77 states have return successors, (172), 105 states have call predecessors, (172), 109 states have call successors, (172) [2021-11-19 15:56:18,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1269 transitions. [2021-11-19 15:56:18,750 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1269 transitions. Word has length 111 [2021-11-19 15:56:18,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:56:18,751 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1269 transitions. [2021-11-19 15:56:18,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 15 states have call successors, (38), 9 states have call predecessors, (38), 11 states have return successors, (34), 13 states have call predecessors, (34), 14 states have call successors, (34) [2021-11-19 15:56:18,751 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1269 transitions. [2021-11-19 15:56:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 15:56:18,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:56:18,756 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 15:56:18,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:56:18,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:56:19,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:56:19,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:56:19,374 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:56:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:56:19,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1895228176, now seen corresponding path program 1 times [2021-11-19 15:56:19,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:56:19,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625532428] [2021-11-19 15:56:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:56:19,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:56:19,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:56:19,377 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:56:19,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:56:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:56:19,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 15:56:19,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:56:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 15:56:22,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:56:23,159 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-19 15:56:23,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-19 15:56:23,167 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-19 15:56:23,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-19 15:56:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 15:56:23,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:56:23,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625532428] [2021-11-19 15:56:23,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625532428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:56:23,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [722210718] [2021-11-19 15:56:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:56:23,341 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:56:23,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:56:23,342 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:56:23,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24bac06b-134e-4539-9ddd-71d59d55bd94/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 15:56:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:56:23,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 15:56:23,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:56:30,224 WARN L227 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 19 DAG size of output: 7 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 15:56:30,225 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 15:56:30,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-19 15:56:38,652 WARN L227 SmtUtils]: Spent 8.42s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 15:56:38,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:56:38,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 84