./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9a96b91703f0cc76adc9b0fdbd8386a96920c1be21a810b6415a59c2166f1461 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:26:40,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:26:40,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:26:40,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:26:40,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:26:40,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:26:40,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:26:40,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:26:40,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:26:40,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:26:40,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:26:40,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:26:40,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:26:40,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:26:40,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:26:40,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:26:40,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:26:40,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:26:40,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:26:40,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:26:40,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:26:40,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:26:40,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:26:40,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:26:40,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:26:40,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:26:40,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:26:40,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:26:40,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:26:40,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:26:40,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:26:40,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:26:40,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:26:40,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:26:40,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:26:40,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:26:40,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:26:40,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:26:40,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:26:40,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:26:40,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:26:40,734 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 02:26:40,759 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:26:40,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:26:40,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:26:40,761 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:26:40,761 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:26:40,762 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:26:40,762 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:26:40,763 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:26:40,763 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:26:40,763 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:26:40,764 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:26:40,764 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:26:40,764 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:26:40,765 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:26:40,765 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:26:40,766 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:26:40,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:26:40,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:26:40,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:26:40,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:26:40,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:26:40,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:26:40,769 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:26:40,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:26:40,770 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:26:40,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:26:40,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:26:40,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:26:40,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:26:40,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:26:40,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:26:40,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:26:40,773 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:26:40,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:26:40,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:26:40,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:26:40,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:26:40,775 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_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a96b91703f0cc76adc9b0fdbd8386a96920c1be21a810b6415a59c2166f1461 [2021-11-13 02:26:41,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:26:41,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:26:41,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:26:41,055 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:26:41,056 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:26:41,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i [2021-11-13 02:26:41,117 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/data/14264c4e9/454b0f5cf22c4ff3ae83f2bced7881d4/FLAGa8676db60 [2021-11-13 02:26:42,079 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:26:42,080 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i [2021-11-13 02:26:42,139 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/data/14264c4e9/454b0f5cf22c4ff3ae83f2bced7881d4/FLAGa8676db60 [2021-11-13 02:26:42,467 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/data/14264c4e9/454b0f5cf22c4ff3ae83f2bced7881d4 [2021-11-13 02:26:42,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:26:42,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:26:42,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:26:42,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:26:42,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:26:42,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:26:42" (1/1) ... [2021-11-13 02:26:42,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@370d6226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:42, skipping insertion in model container [2021-11-13 02:26:42,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:26:42" (1/1) ... [2021-11-13 02:26:42,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:26:42,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:26:42,920 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4494,4507] [2021-11-13 02:26:42,930 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4554,4567] [2021-11-13 02:26:42,959 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:26:42,967 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:26:43,921 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:43,922 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:43,923 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:43,924 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:43,925 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:43,945 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:43,946 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:43,953 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:43,955 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:44,397 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:26:44,399 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:26:44,403 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:26:44,405 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:26:44,413 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:26:44,416 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:26:44,417 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:26:44,418 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:26:44,422 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:26:44,424 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:26:44,623 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:26:44,711 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:44,711 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:44,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:26:44,832 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 02:26:44,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@61adf13c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:44, skipping insertion in model container [2021-11-13 02:26:44,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:26:44,834 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:26:44,836 INFO L158 Benchmark]: Toolchain (without parser) took 2361.87ms. Allocated memory is still 113.2MB. Free memory was 85.6MB in the beginning and 61.8MB in the end (delta: 23.8MB). Peak memory consumption was 32.1MB. Max. memory is 16.1GB. [2021-11-13 02:26:44,837 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 83.9MB. Free memory was 64.4MB in the beginning and 64.3MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:26:44,838 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2356.46ms. Allocated memory is still 113.2MB. Free memory was 85.6MB in the beginning and 61.8MB in the end (delta: 23.8MB). Peak memory consumption was 32.1MB. Max. memory is 16.1GB. [2021-11-13 02:26:44,840 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 83.9MB. Free memory was 64.4MB in the beginning and 64.3MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2356.46ms. Allocated memory is still 113.2MB. Free memory was 85.6MB in the beginning and 61.8MB in the end (delta: 23.8MB). Peak memory consumption was 32.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6990]: 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_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9a96b91703f0cc76adc9b0fdbd8386a96920c1be21a810b6415a59c2166f1461 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:26:47,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:26:47,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:26:47,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:26:47,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:26:47,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:26:47,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:26:47,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:26:47,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:26:47,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:26:47,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:26:47,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:26:47,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:26:47,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:26:47,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:26:47,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:26:47,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:26:47,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:26:47,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:26:47,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:26:47,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:26:47,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:26:47,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:26:47,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:26:47,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:26:47,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:26:47,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:26:47,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:26:47,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:26:47,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:26:47,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:26:47,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:26:47,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:26:47,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:26:47,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:26:47,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:26:47,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:26:47,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:26:47,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:26:47,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:26:47,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:26:47,198 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 02:26:47,245 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:26:47,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:26:47,247 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:26:47,248 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:26:47,248 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:26:47,248 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:26:47,249 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:26:47,249 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:26:47,249 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:26:47,250 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:26:47,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:26:47,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:26:47,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:26:47,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:26:47,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:26:47,253 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:26:47,254 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:26:47,254 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:26:47,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:26:47,254 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:26:47,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:26:47,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:26:47,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:26:47,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:26:47,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:26:47,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:26:47,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:26:47,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:26:47,257 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:26:47,257 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:26:47,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:26:47,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:26:47,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:26:47,258 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_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a96b91703f0cc76adc9b0fdbd8386a96920c1be21a810b6415a59c2166f1461 [2021-11-13 02:26:47,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:26:47,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:26:47,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:26:47,674 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:26:47,675 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:26:47,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i [2021-11-13 02:26:47,761 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/data/b92a08bb1/090451ee04cd4628b41a77e32dffb073/FLAG21a0def1c [2021-11-13 02:26:48,750 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:26:48,750 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i [2021-11-13 02:26:48,803 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/data/b92a08bb1/090451ee04cd4628b41a77e32dffb073/FLAG21a0def1c [2021-11-13 02:26:49,162 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/data/b92a08bb1/090451ee04cd4628b41a77e32dffb073 [2021-11-13 02:26:49,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:26:49,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:26:49,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:26:49,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:26:49,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:26:49,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:26:49" (1/1) ... [2021-11-13 02:26:49,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424cf042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:49, skipping insertion in model container [2021-11-13 02:26:49,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:26:49" (1/1) ... [2021-11-13 02:26:49,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:26:49,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:26:49,670 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4494,4507] [2021-11-13 02:26:49,679 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4554,4567] [2021-11-13 02:26:49,707 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:26:49,713 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:26:50,678 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:50,679 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:50,680 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:50,681 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:50,682 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:50,711 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:50,714 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:50,717 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:50,720 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:51,243 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:26:51,244 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:26:51,245 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:26:51,247 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:26:51,251 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:26:51,252 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:26:51,253 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:26:51,255 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:26:51,256 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:26:51,257 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:26:51,467 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:26:51,673 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:51,680 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:51,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:26:51,845 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:26:51,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:26:51,920 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4494,4507] [2021-11-13 02:26:51,920 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4554,4567] [2021-11-13 02:26:51,921 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:26:51,922 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:26:51,959 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:51,960 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:51,960 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:51,961 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:51,961 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:51,967 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:51,967 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:51,968 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:51,969 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:52,002 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:26:52,003 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:26:52,004 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:26:52,004 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:26:52,005 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:26:52,026 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:26:52,027 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:26:52,027 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:26:52,028 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:26:52,028 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:26:52,066 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:26:52,151 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:52,151 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:52,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:26:52,255 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:26:52,281 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4494,4507] [2021-11-13 02:26:52,282 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/sv-benchmarks/c/aws-c-common/aws_byte_buf_advance_harness.i[4554,4567] [2021-11-13 02:26:52,284 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:26:52,286 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:26:52,336 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:52,336 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:52,337 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:52,337 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:52,338 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:52,344 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:52,345 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:52,346 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:52,346 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:52,382 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:26:52,383 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:26:52,383 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:26:52,384 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:26:52,385 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:26:52,385 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:26:52,386 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:26:52,386 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:26:52,387 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:26:52,388 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:26:52,412 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:26:52,534 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:52,535 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:26:52,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:26:52,896 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:26:52,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:52 WrapperNode [2021-11-13 02:26:52,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:26:52,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:26:52,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:26:52,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:26:52,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:52" (1/1) ... [2021-11-13 02:26:53,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:52" (1/1) ... [2021-11-13 02:26:53,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:26:53,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:26:53,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:26:53,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:26:53,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:52" (1/1) ... [2021-11-13 02:26:53,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:52" (1/1) ... [2021-11-13 02:26:53,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:52" (1/1) ... [2021-11-13 02:26:53,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:52" (1/1) ... [2021-11-13 02:26:53,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:52" (1/1) ... [2021-11-13 02:26:53,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:52" (1/1) ... [2021-11-13 02:26:53,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:52" (1/1) ... [2021-11-13 02:26:53,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:26:53,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:26:53,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:26:53,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:26:53,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:52" (1/1) ... [2021-11-13 02:26:53,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:26:53,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:26:53,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:26:53,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:26:53,472 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-13 02:26:53,472 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-13 02:26:53,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:26:53,473 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-13 02:26:53,473 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-13 02:26:53,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:26:53,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 02:26:53,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 02:26:53,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 02:26:53,474 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 02:26:53,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:26:53,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:26:53,475 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-13 02:26:53,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-13 02:26:53,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:26:53,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:26:53,476 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-13 02:26:53,476 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-13 02:26:53,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 02:26:53,476 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-13 02:26:53,476 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-13 02:26:53,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 02:26:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 02:26:53,477 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 02:26:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:26:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:26:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 02:26:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 02:26:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 02:26:53,478 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-13 02:26:53,478 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-13 02:26:53,478 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-11-13 02:26:53,478 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-11-13 02:26:53,478 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-13 02:26:53,479 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-13 02:26:53,479 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-13 02:26:53,479 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-13 02:27:13,055 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:27:13,056 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 02:27:13,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:27:13 BoogieIcfgContainer [2021-11-13 02:27:13,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:27:13,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:27:13,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:27:13,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:27:13,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:26:49" (1/3) ... [2021-11-13 02:27:13,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483b953d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:27:13, skipping insertion in model container [2021-11-13 02:27:13,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:52" (2/3) ... [2021-11-13 02:27:13,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483b953d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:27:13, skipping insertion in model container [2021-11-13 02:27:13,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:27:13" (3/3) ... [2021-11-13 02:27:13,066 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_advance_harness.i [2021-11-13 02:27:13,071 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:27:13,071 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:27:13,132 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:27:13,138 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:27:13,138 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:27:13,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 173 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 106 states have internal predecessors, (130), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2021-11-13 02:27:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-13 02:27:13,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:13,173 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:13,174 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:13,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:13,179 INFO L85 PathProgramCache]: Analyzing trace with hash -851421027, now seen corresponding path program 1 times [2021-11-13 02:27:13,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:27:13,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292509319] [2021-11-13 02:27:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:13,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:27:13,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:27:13,206 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:27:13,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:27:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:17,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 1916 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 02:27:17,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:27:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 02:27:18,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:27:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-13 02:27:18,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:27:18,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292509319] [2021-11-13 02:27:18,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292509319] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:27:18,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:27:18,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-13 02:27:18,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256235507] [2021-11-13 02:27:18,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:18,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:27:18,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:27:18,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:27:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:27:18,453 INFO L87 Difference]: Start difference. First operand has 173 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 106 states have internal predecessors, (130), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 02:27:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:18,546 INFO L93 Difference]: Finished difference Result 342 states and 513 transitions. [2021-11-13 02:27:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:27:18,550 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 89 [2021-11-13 02:27:18,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:18,567 INFO L225 Difference]: With dead ends: 342 [2021-11-13 02:27:18,567 INFO L226 Difference]: Without dead ends: 168 [2021-11-13 02:27:18,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:27:18,579 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.49ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:18,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 6.49ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:27:18,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-13 02:27:18,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-13 02:27:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 101 states have (on average 1.198019801980198) internal successors, (121), 102 states have internal predecessors, (121), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-11-13 02:27:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 230 transitions. [2021-11-13 02:27:18,637 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 230 transitions. Word has length 89 [2021-11-13 02:27:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:18,639 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 230 transitions. [2021-11-13 02:27:18,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 02:27:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 230 transitions. [2021-11-13 02:27:18,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-13 02:27:18,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:18,645 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:18,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-13 02:27:18,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:27:18,862 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:18,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2005321356, now seen corresponding path program 1 times [2021-11-13 02:27:18,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:27:18,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077409353] [2021-11-13 02:27:18,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:18,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:27:18,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:27:18,874 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:27:18,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:27:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:23,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:27:23,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:27:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 02:27:23,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:27:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 02:27:24,458 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:27:24,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077409353] [2021-11-13 02:27:24,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077409353] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:27:24,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:27:24,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-13 02:27:24,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757936726] [2021-11-13 02:27:24,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:24,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:27:24,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:27:24,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:27:24,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:24,461 INFO L87 Difference]: Start difference. First operand 168 states and 230 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:27:26,572 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:27:27,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:27,035 INFO L93 Difference]: Finished difference Result 412 states and 594 transitions. [2021-11-13 02:27:27,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:27:27,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 96 [2021-11-13 02:27:27,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:27,043 INFO L225 Difference]: With dead ends: 412 [2021-11-13 02:27:27,043 INFO L226 Difference]: Without dead ends: 251 [2021-11-13 02:27:27,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:27,046 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 75 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2403.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.76ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2512.74ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:27,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 858 Invalid, 96 Unknown, 0 Unchecked, 10.76ms Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 1 Unknown, 0 Unchecked, 2512.74ms Time] [2021-11-13 02:27:27,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-13 02:27:27,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2021-11-13 02:27:27,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 145 states have (on average 1.186206896551724) internal successors, (172), 148 states have internal predecessors, (172), 89 states have call successors, (89), 11 states have call predecessors, (89), 12 states have return successors, (105), 87 states have call predecessors, (105), 88 states have call successors, (105) [2021-11-13 02:27:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 366 transitions. [2021-11-13 02:27:27,088 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 366 transitions. Word has length 96 [2021-11-13 02:27:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:27,089 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 366 transitions. [2021-11-13 02:27:27,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:27:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 366 transitions. [2021-11-13 02:27:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-13 02:27:27,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:27,093 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:27,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-13 02:27:27,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:27:27,294 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:27,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:27,294 INFO L85 PathProgramCache]: Analyzing trace with hash -304504407, now seen corresponding path program 1 times [2021-11-13 02:27:27,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:27:27,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355795253] [2021-11-13 02:27:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:27,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:27:27,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:27:27,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:27:27,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:27:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:31,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 02:27:31,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:27:32,070 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 02:27:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 02:27:33,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:27:35,234 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 40 treesize of output 34 [2021-11-13 02:27:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 02:27:35,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:27:35,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355795253] [2021-11-13 02:27:35,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355795253] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:27:35,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:27:35,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 18 [2021-11-13 02:27:35,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505020115] [2021-11-13 02:27:35,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:35,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:27:35,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:27:35,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:27:35,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:27:35,444 INFO L87 Difference]: Start difference. First operand 247 states and 366 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-13 02:27:37,746 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:27:40,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:27:42,128 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:27:44,394 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:27:46,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:27:46,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:46,605 INFO L93 Difference]: Finished difference Result 507 states and 745 transitions. [2021-11-13 02:27:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 02:27:46,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 102 [2021-11-13 02:27:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:46,611 INFO L225 Difference]: With dead ends: 507 [2021-11-13 02:27:46,611 INFO L226 Difference]: Without dead ends: 260 [2021-11-13 02:27:46,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:27:46,615 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 19 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10804.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.69ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 11001.78ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:46,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1654 Invalid, 175 Unknown, 0 Unchecked, 9.69ms Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 5 Unknown, 117 Unchecked, 11001.78ms Time] [2021-11-13 02:27:46,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-13 02:27:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-11-13 02:27:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 157 states have (on average 1.1910828025477707) internal successors, (187), 160 states have internal predecessors, (187), 89 states have call successors, (89), 12 states have call predecessors, (89), 13 states have return successors, (106), 87 states have call predecessors, (106), 88 states have call successors, (106) [2021-11-13 02:27:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 382 transitions. [2021-11-13 02:27:46,655 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 382 transitions. Word has length 102 [2021-11-13 02:27:46,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:46,656 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 382 transitions. [2021-11-13 02:27:46,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-13 02:27:46,656 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 382 transitions. [2021-11-13 02:27:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-13 02:27:46,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:46,659 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:46,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:27:46,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:27:46,882 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:46,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:46,883 INFO L85 PathProgramCache]: Analyzing trace with hash -358897305, now seen corresponding path program 1 times [2021-11-13 02:27:46,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:27:46,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140615785] [2021-11-13 02:27:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:46,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:27:46,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:27:46,888 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:27:46,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:27:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:51,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1958 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:27:51,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:27:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 02:27:51,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:27:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 02:27:51,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:27:51,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140615785] [2021-11-13 02:27:51,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140615785] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:27:51,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:27:51,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-13 02:27:51,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471772534] [2021-11-13 02:27:51,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:51,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:27:51,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:27:51,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:27:51,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:27:51,810 INFO L87 Difference]: Start difference. First operand 260 states and 382 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:27:51,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:51,910 INFO L93 Difference]: Finished difference Result 510 states and 769 transitions. [2021-11-13 02:27:51,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:27:51,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 102 [2021-11-13 02:27:51,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:51,915 INFO L225 Difference]: With dead ends: 510 [2021-11-13 02:27:51,915 INFO L226 Difference]: Without dead ends: 266 [2021-11-13 02:27:51,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:51,918 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 20 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.88ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.01ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:51,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 682 Invalid, 16 Unknown, 0 Unchecked, 2.88ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 57.01ms Time] [2021-11-13 02:27:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-13 02:27:51,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 254. [2021-11-13 02:27:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 152 states have (on average 1.1907894736842106) internal successors, (181), 154 states have internal predecessors, (181), 89 states have call successors, (89), 12 states have call predecessors, (89), 12 states have return successors, (105), 87 states have call predecessors, (105), 88 states have call successors, (105) [2021-11-13 02:27:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 375 transitions. [2021-11-13 02:27:51,950 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 375 transitions. Word has length 102 [2021-11-13 02:27:51,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:51,950 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 375 transitions. [2021-11-13 02:27:51,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:27:51,951 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 375 transitions. [2021-11-13 02:27:51,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 02:27:51,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:51,953 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:52,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:27:52,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:27:52,174 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:52,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:52,175 INFO L85 PathProgramCache]: Analyzing trace with hash 197444513, now seen corresponding path program 1 times [2021-11-13 02:27:52,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:27:52,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106937299] [2021-11-13 02:27:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:52,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:27:52,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:27:52,180 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:27:52,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:27:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:56,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 1970 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:27:56,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:27:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 02:27:57,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:27:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 02:27:57,958 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:27:57,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106937299] [2021-11-13 02:27:57,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106937299] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:27:57,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:27:57,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-13 02:27:57,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288170757] [2021-11-13 02:27:57,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:57,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:27:57,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:27:57,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:27:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:27:57,960 INFO L87 Difference]: Start difference. First operand 254 states and 375 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:28:00,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:02,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:04,941 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:06,962 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:09,430 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:11,443 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:13,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:15,542 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:16,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:16,183 INFO L93 Difference]: Finished difference Result 516 states and 795 transitions. [2021-11-13 02:28:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:16,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 106 [2021-11-13 02:28:16,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:16,189 INFO L225 Difference]: With dead ends: 516 [2021-11-13 02:28:16,190 INFO L226 Difference]: Without dead ends: 274 [2021-11-13 02:28:16,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:28:16,193 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 42 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17622.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.29ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 18001.26ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:16,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 821 Invalid, 159 Unknown, 0 Unchecked, 5.29ms Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 7 Unknown, 51 Unchecked, 18001.26ms Time] [2021-11-13 02:28:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-13 02:28:16,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 263. [2021-11-13 02:28:16,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 161 states have (on average 1.1987577639751552) internal successors, (193), 163 states have internal predecessors, (193), 89 states have call successors, (89), 12 states have call predecessors, (89), 12 states have return successors, (105), 87 states have call predecessors, (105), 88 states have call successors, (105) [2021-11-13 02:28:16,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 387 transitions. [2021-11-13 02:28:16,221 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 387 transitions. Word has length 106 [2021-11-13 02:28:16,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:16,222 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 387 transitions. [2021-11-13 02:28:16,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:28:16,222 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 387 transitions. [2021-11-13 02:28:16,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 02:28:16,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:16,225 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:16,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:16,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:16,446 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:16,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:16,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1488735325, now seen corresponding path program 1 times [2021-11-13 02:28:16,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:16,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691557968] [2021-11-13 02:28:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:16,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:16,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:16,454 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:16,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:28:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:20,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 1967 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 02:28:20,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:28:23,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-13 02:28:25,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:25,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691557968] [2021-11-13 02:28:25,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691557968] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:25,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:28:25,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-13 02:28:25,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750915925] [2021-11-13 02:28:25,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:25,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:28:25,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:25,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:28:25,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:28:25,979 INFO L87 Difference]: Start difference. First operand 263 states and 387 transitions. Second operand has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:28:28,219 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:30,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:35,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:37,155 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:39,741 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:41,757 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:43,873 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:45,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:46,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:46,796 INFO L93 Difference]: Finished difference Result 524 states and 821 transitions. [2021-11-13 02:28:46,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 02:28:46,800 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 106 [2021-11-13 02:28:46,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:46,803 INFO L225 Difference]: With dead ends: 524 [2021-11-13 02:28:46,803 INFO L226 Difference]: Without dead ends: 272 [2021-11-13 02:28:46,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-13 02:28:46,807 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 38 mSDsluCounter, 1953 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 2 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18372.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.93ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 18850.41ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:46,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2188 Invalid, 656 Unknown, 0 Unchecked, 9.93ms Time], IncrementalHoareTripleChecker [2 Valid, 258 Invalid, 8 Unknown, 388 Unchecked, 18850.41ms Time] [2021-11-13 02:28:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-13 02:28:46,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 268. [2021-11-13 02:28:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 165 states have (on average 1.1818181818181819) internal successors, (195), 168 states have internal predecessors, (195), 89 states have call successors, (89), 12 states have call predecessors, (89), 13 states have return successors, (123), 87 states have call predecessors, (123), 88 states have call successors, (123) [2021-11-13 02:28:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 407 transitions. [2021-11-13 02:28:46,836 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 407 transitions. Word has length 106 [2021-11-13 02:28:46,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:46,837 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 407 transitions. [2021-11-13 02:28:46,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:28:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 407 transitions. [2021-11-13 02:28:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 02:28:46,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:46,840 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:46,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:47,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:47,054 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2105902303, now seen corresponding path program 1 times [2021-11-13 02:28:47,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:47,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700955801] [2021-11-13 02:28:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:47,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:47,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:47,061 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:47,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:28:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:51,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 1968 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:28:51,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 02:28:51,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 02:28:51,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:51,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700955801] [2021-11-13 02:28:51,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700955801] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:51,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:28:51,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-13 02:28:51,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605200003] [2021-11-13 02:28:51,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:51,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:51,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:51,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:51,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:51,837 INFO L87 Difference]: Start difference. First operand 268 states and 407 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:28:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:51,937 INFO L93 Difference]: Finished difference Result 528 states and 819 transitions. [2021-11-13 02:28:51,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:51,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 106 [2021-11-13 02:28:51,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:51,942 INFO L225 Difference]: With dead ends: 528 [2021-11-13 02:28:51,942 INFO L226 Difference]: Without dead ends: 272 [2021-11-13 02:28:51,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:51,946 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 34 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.74ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:51,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 673 Invalid, 13 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 59.74ms Time] [2021-11-13 02:28:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-13 02:28:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 264. [2021-11-13 02:28:51,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 161 states have (on average 1.1677018633540373) internal successors, (188), 164 states have internal predecessors, (188), 89 states have call successors, (89), 12 states have call predecessors, (89), 13 states have return successors, (123), 87 states have call predecessors, (123), 88 states have call successors, (123) [2021-11-13 02:28:51,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 400 transitions. [2021-11-13 02:28:51,980 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 400 transitions. Word has length 106 [2021-11-13 02:28:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:51,982 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 400 transitions. [2021-11-13 02:28:51,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:28:51,983 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 400 transitions. [2021-11-13 02:28:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 02:28:51,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:51,985 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:52,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:52,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:52,206 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:52,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:52,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1235124835, now seen corresponding path program 1 times [2021-11-13 02:28:52,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:52,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104204903] [2021-11-13 02:28:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:52,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:52,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:52,211 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:52,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:28:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:56,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:28:56,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:28:56,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-13 02:28:57,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:57,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104204903] [2021-11-13 02:28:57,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104204903] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:57,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:28:57,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-13 02:28:57,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125967204] [2021-11-13 02:28:57,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:57,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:28:57,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:57,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:28:57,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:28:57,392 INFO L87 Difference]: Start difference. First operand 264 states and 400 transitions. Second operand has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:28:58,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:58,008 INFO L93 Difference]: Finished difference Result 527 states and 830 transitions. [2021-11-13 02:28:58,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:28:58,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 106 [2021-11-13 02:28:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:58,012 INFO L225 Difference]: With dead ends: 527 [2021-11-13 02:28:58,012 INFO L226 Difference]: Without dead ends: 273 [2021-11-13 02:28:58,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:28:58,015 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 12 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 437.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.06ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 475.72ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:58,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1685 Invalid, 142 Unknown, 0 Unchecked, 5.06ms Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 475.72ms Time] [2021-11-13 02:28:58,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-13 02:28:58,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 264. [2021-11-13 02:28:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 161 states have (on average 1.1677018633540373) internal successors, (188), 164 states have internal predecessors, (188), 89 states have call successors, (89), 12 states have call predecessors, (89), 13 states have return successors, (123), 87 states have call predecessors, (123), 88 states have call successors, (123) [2021-11-13 02:28:58,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 400 transitions. [2021-11-13 02:28:58,042 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 400 transitions. Word has length 106 [2021-11-13 02:28:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:58,043 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 400 transitions. [2021-11-13 02:28:58,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:28:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 400 transitions. [2021-11-13 02:28:58,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-13 02:28:58,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:58,046 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:58,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:58,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:58,263 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:58,263 INFO L85 PathProgramCache]: Analyzing trace with hash -502310762, now seen corresponding path program 1 times [2021-11-13 02:28:58,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:58,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669717494] [2021-11-13 02:28:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:58,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:58,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:58,269 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:58,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:29:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:02,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1972 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:29:02,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:29:02,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 02:29:03,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:03,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669717494] [2021-11-13 02:29:03,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669717494] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:29:03,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:29:03,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-13 02:29:03,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289948452] [2021-11-13 02:29:03,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:03,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:29:03,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:03,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:29:03,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:29:03,315 INFO L87 Difference]: Start difference. First operand 264 states and 400 transitions. Second operand has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 02:29:05,381 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:07,631 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:07,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:07,956 INFO L93 Difference]: Finished difference Result 553 states and 850 transitions. [2021-11-13 02:29:07,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:29:07,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 108 [2021-11-13 02:29:07,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:07,961 INFO L225 Difference]: With dead ends: 553 [2021-11-13 02:29:07,961 INFO L226 Difference]: Without dead ends: 348 [2021-11-13 02:29:07,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:29:07,964 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 110 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4463.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.15ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4587.99ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:07,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 934 Invalid, 148 Unknown, 0 Unchecked, 4.15ms Time], IncrementalHoareTripleChecker [72 Valid, 74 Invalid, 2 Unknown, 0 Unchecked, 4587.99ms Time] [2021-11-13 02:29:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-13 02:29:07,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 255. [2021-11-13 02:29:07,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 157 states have (on average 1.1719745222929936) internal successors, (184), 160 states have internal predecessors, (184), 84 states have call successors, (84), 12 states have call predecessors, (84), 13 states have return successors, (111), 82 states have call predecessors, (111), 83 states have call successors, (111) [2021-11-13 02:29:07,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 379 transitions. [2021-11-13 02:29:07,984 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 379 transitions. Word has length 108 [2021-11-13 02:29:07,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:07,985 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 379 transitions. [2021-11-13 02:29:07,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 02:29:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 379 transitions. [2021-11-13 02:29:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-13 02:29:07,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:07,988 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:08,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:08,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:29:08,202 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:08,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1772700981, now seen corresponding path program 1 times [2021-11-13 02:29:08,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:08,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251942802] [2021-11-13 02:29:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:08,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:08,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:08,208 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:08,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:29:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:12,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1985 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:29:12,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 02:29:12,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-13 02:29:13,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:13,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251942802] [2021-11-13 02:29:13,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251942802] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:29:13,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:29:13,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-13 02:29:13,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664304939] [2021-11-13 02:29:13,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:13,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:29:13,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:13,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:29:13,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:29:13,365 INFO L87 Difference]: Start difference. First operand 255 states and 379 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 02:29:15,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:17,591 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:18,012 INFO L93 Difference]: Finished difference Result 501 states and 754 transitions. [2021-11-13 02:29:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:29:18,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 114 [2021-11-13 02:29:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:18,016 INFO L225 Difference]: With dead ends: 501 [2021-11-13 02:29:18,017 INFO L226 Difference]: Without dead ends: 299 [2021-11-13 02:29:18,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:29:18,019 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 109 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4486.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.05ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4593.15ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:18,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 1201 Invalid, 157 Unknown, 0 Unchecked, 4.05ms Time], IncrementalHoareTripleChecker [65 Valid, 90 Invalid, 2 Unknown, 0 Unchecked, 4593.15ms Time] [2021-11-13 02:29:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-13 02:29:18,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2021-11-13 02:29:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 181 states have (on average 1.171270718232044) internal successors, (212), 185 states have internal predecessors, (212), 103 states have call successors, (103), 12 states have call predecessors, (103), 13 states have return successors, (128), 100 states have call predecessors, (128), 102 states have call successors, (128) [2021-11-13 02:29:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 443 transitions. [2021-11-13 02:29:18,042 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 443 transitions. Word has length 114 [2021-11-13 02:29:18,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:18,043 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 443 transitions. [2021-11-13 02:29:18,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 02:29:18,044 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 443 transitions. [2021-11-13 02:29:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 02:29:18,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:18,046 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:18,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:18,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:29:18,269 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:18,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:18,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1611498304, now seen corresponding path program 2 times [2021-11-13 02:29:18,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:18,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146522011] [2021-11-13 02:29:18,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:29:18,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:18,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:18,276 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:18,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:29:22,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 02:29:22,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:29:22,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:29:22,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-13 02:29:22,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-13 02:29:23,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:23,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146522011] [2021-11-13 02:29:23,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146522011] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:23,116 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:29:23,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 02:29:23,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850436491] [2021-11-13 02:29:23,117 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:23,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:29:23,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:23,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:29:23,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:29:23,118 INFO L87 Difference]: Start difference. First operand 298 states and 443 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:29:25,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:25,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:25,476 INFO L93 Difference]: Finished difference Result 446 states and 662 transitions. [2021-11-13 02:29:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:29:25,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 120 [2021-11-13 02:29:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:25,482 INFO L225 Difference]: With dead ends: 446 [2021-11-13 02:29:25,482 INFO L226 Difference]: Without dead ends: 298 [2021-11-13 02:29:25,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:29:25,485 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 22 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2278.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.80ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2332.95ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:25,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 843 Invalid, 52 Unknown, 0 Unchecked, 2.80ms Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 1 Unknown, 0 Unchecked, 2332.95ms Time] [2021-11-13 02:29:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-13 02:29:25,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-11-13 02:29:25,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 181 states have (on average 1.171270718232044) internal successors, (212), 185 states have internal predecessors, (212), 103 states have call successors, (103), 12 states have call predecessors, (103), 13 states have return successors, (126), 100 states have call predecessors, (126), 102 states have call successors, (126) [2021-11-13 02:29:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 441 transitions. [2021-11-13 02:29:25,512 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 441 transitions. Word has length 120 [2021-11-13 02:29:25,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:25,513 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 441 transitions. [2021-11-13 02:29:25,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:29:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 441 transitions. [2021-11-13 02:29:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-13 02:29:25,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:25,516 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:25,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:25,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:29:25,742 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:25,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:25,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1804072683, now seen corresponding path program 1 times [2021-11-13 02:29:25,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:25,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056400799] [2021-11-13 02:29:25,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:25,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:25,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:25,748 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:25,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:29:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:30,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 2011 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-13 02:29:30,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:34,987 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 126 treesize of output 118 [2021-11-13 02:29:35,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:29:35,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 117 treesize of output 53 [2021-11-13 02:29:35,016 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 53 treesize of output 45 [2021-11-13 02:29:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 88 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 02:29:35,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:38,269 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 146 treesize of output 134 [2021-11-13 02:29:38,273 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-13 02:29:39,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:29:39,868 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 102 treesize of output 105 [2021-11-13 02:29:39,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:29:39,918 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 101 treesize of output 104 [2021-11-13 02:29:50,928 WARN L227 SmtUtils]: Spent 9.90s on a formula simplification. DAG size of input: 523 DAG size of output: 269 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 02:29:50,932 INFO L354 Elim1Store]: treesize reduction 837, result has 46.8 percent of original size [2021-11-13 02:29:50,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 135 treesize of output 778 [2021-11-13 02:30:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 02:30:05,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:30:05,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056400799] [2021-11-13 02:30:05,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056400799] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:30:05,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1128285273] [2021-11-13 02:30:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:05,283 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:30:05,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:30:05,285 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:30:05,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 02:30:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:16,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 2011 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-13 02:30:16,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:25,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:30:25,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-13 02:30:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 79 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 02:30:26,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-13 02:30:35,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1128285273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:30:35,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215904603] [2021-11-13 02:30:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:35,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:30:35,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:30:35,086 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:30:35,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 02:30:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:36,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 2011 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 02:30:36,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-13 02:30:42,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-13 02:30:44,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215904603] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:30:44,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-13 02:30:44,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [16, 13, 13, 10, 13] total 51 [2021-11-13 02:30:44,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141053226] [2021-11-13 02:30:44,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:30:44,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:30:44,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:30:44,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:30:44,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2406, Unknown=0, NotChecked=0, Total=2550 [2021-11-13 02:30:44,872 INFO L87 Difference]: Start difference. First operand 298 states and 441 transitions. Second operand has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-13 02:30:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:30:46,104 INFO L93 Difference]: Finished difference Result 312 states and 473 transitions. [2021-11-13 02:30:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:30:46,104 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 126 [2021-11-13 02:30:46,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:30:46,108 INFO L225 Difference]: With dead ends: 312 [2021-11-13 02:30:46,108 INFO L226 Difference]: Without dead ends: 310 [2021-11-13 02:30:46,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 687 SyntacticMatches, 14 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 02:30:46,110 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 23 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 244.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.71ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 277.06ms IncrementalHoareTripleChecker+Time [2021-11-13 02:30:46,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1576 Invalid, 67 Unknown, 0 Unchecked, 3.71ms Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 277.06ms Time] [2021-11-13 02:30:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-13 02:30:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2021-11-13 02:30:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 192 states have internal predecessors, (218), 105 states have call successors, (105), 13 states have call predecessors, (105), 15 states have return successors, (146), 102 states have call predecessors, (146), 104 states have call successors, (146) [2021-11-13 02:30:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 469 transitions. [2021-11-13 02:30:46,135 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 469 transitions. Word has length 126 [2021-11-13 02:30:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:30:46,136 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 469 transitions. [2021-11-13 02:30:46,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-13 02:30:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 469 transitions. [2021-11-13 02:30:46,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 02:30:46,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:30:46,139 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:30:46,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:46,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:46,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:46,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:30:46,755 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:30:46,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:30:46,755 INFO L85 PathProgramCache]: Analyzing trace with hash 364744369, now seen corresponding path program 1 times [2021-11-13 02:30:46,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:30:46,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867197382] [2021-11-13 02:30:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:46,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:30:46,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:30:46,760 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:30:46,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 02:30:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:51,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 2017 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-13 02:30:51,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:55,908 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 126 treesize of output 118 [2021-11-13 02:30:55,916 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 113 treesize of output 105 [2021-11-13 02:30:55,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:30:55,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 38 [2021-11-13 02:30:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 92 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 02:30:56,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:59,197 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 146 treesize of output 134 [2021-11-13 02:30:59,201 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-13 02:31:00,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:00,736 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 102 treesize of output 105 [2021-11-13 02:31:00,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:00,789 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 101 treesize of output 104 [2021-11-13 02:31:12,341 WARN L227 SmtUtils]: Spent 10.48s on a formula simplification. DAG size of input: 523 DAG size of output: 269 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 02:31:12,343 INFO L354 Elim1Store]: treesize reduction 837, result has 46.8 percent of original size [2021-11-13 02:31:12,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 135 treesize of output 778 [2021-11-13 02:31:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 02:31:21,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:21,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867197382] [2021-11-13 02:31:21,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867197382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:21,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1114111111] [2021-11-13 02:31:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:21,707 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:31:21,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:31:21,708 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:31:21,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-13 02:31:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:32,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 2017 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-13 02:31:32,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:41,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:41,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 197 treesize of output 69 [2021-11-13 02:31:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 83 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 02:31:41,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-13 02:31:50,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1114111111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:50,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559818424] [2021-11-13 02:31:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:50,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:31:50,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:31:50,171 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:31:50,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 02:31:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:51,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 2017 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 02:31:51,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:54,884 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 126 treesize of output 118 [2021-11-13 02:31:54,891 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 113 treesize of output 105 [2021-11-13 02:31:54,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:54,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 38 [2021-11-13 02:31:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 92 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 02:31:55,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:56,777 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 146 treesize of output 134 [2021-11-13 02:31:56,782 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-13 02:31:57,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:57,103 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 102 treesize of output 105 [2021-11-13 02:31:57,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:57,150 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 101 treesize of output 104 [2021-11-13 02:32:07,069 WARN L227 SmtUtils]: Spent 9.63s on a formula simplification. DAG size of input: 523 DAG size of output: 269 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 02:32:07,071 INFO L354 Elim1Store]: treesize reduction 837, result has 46.8 percent of original size [2021-11-13 02:32:07,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 135 treesize of output 778 [2021-11-13 02:32:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 02:32:26,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559818424] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:26,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:32:26,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13, 10, 16, 13] total 38 [2021-11-13 02:32:26,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12269603] [2021-11-13 02:32:26,193 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:32:26,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-13 02:32:26,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:26,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-13 02:32:26,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1292, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 02:32:26,196 INFO L87 Difference]: Start difference. First operand 308 states and 469 transitions. Second operand has 38 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 38 states have internal predecessors, (152), 11 states have call successors, (35), 4 states have call predecessors, (35), 9 states have return successors, (36), 8 states have call predecessors, (36), 11 states have call successors, (36) [2021-11-13 02:32:28,411 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:30,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:32,435 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:34,451 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:36,467 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:38,480 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:40,496 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:42,509 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:56,633 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:12,933 WARN L227 SmtUtils]: Spent 14.45s on a formula simplification. DAG size of input: 106 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:33:28,257 WARN L227 SmtUtils]: Spent 14.66s on a formula simplification. DAG size of input: 114 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:33:37,768 WARN L227 SmtUtils]: Spent 8.95s on a formula simplification. DAG size of input: 154 DAG size of output: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:33:53,477 WARN L227 SmtUtils]: Spent 14.94s on a formula simplification. DAG size of input: 127 DAG size of output: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:34:03,267 WARN L227 SmtUtils]: Spent 9.30s on a formula simplification. DAG size of input: 159 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:34:19,222 WARN L227 SmtUtils]: Spent 15.22s on a formula simplification. DAG size of input: 130 DAG size of output: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:34:28,708 WARN L227 SmtUtils]: Spent 8.82s on a formula simplification. DAG size of input: 163 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:34:47,764 WARN L227 SmtUtils]: Spent 18.32s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:35:07,657 WARN L227 SmtUtils]: Spent 18.25s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:35:26,912 WARN L227 SmtUtils]: Spent 14.62s on a formula simplification. DAG size of input: 171 DAG size of output: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:35:43,494 WARN L227 SmtUtils]: Spent 14.89s on a formula simplification. DAG size of input: 179 DAG size of output: 149 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:35:55,522 WARN L227 SmtUtils]: Spent 9.19s on a formula simplification. DAG size of input: 216 DAG size of output: 153 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:36:11,347 WARN L227 SmtUtils]: Spent 15.21s on a formula simplification. DAG size of input: 153 DAG size of output: 145 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:36:22,012 WARN L227 SmtUtils]: Spent 9.59s on a formula simplification. DAG size of input: 221 DAG size of output: 158 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:36:37,968 WARN L227 SmtUtils]: Spent 15.38s on a formula simplification. DAG size of input: 156 DAG size of output: 148 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:36:52,993 WARN L227 SmtUtils]: Spent 14.52s on a formula simplification. DAG size of input: 142 DAG size of output: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:37:02,623 WARN L227 SmtUtils]: Spent 9.05s on a formula simplification. DAG size of input: 225 DAG size of output: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:37:19,979 WARN L227 SmtUtils]: Spent 14.77s on a formula simplification. DAG size of input: 150 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:37:29,535 WARN L227 SmtUtils]: Spent 9.09s on a formula simplification. DAG size of input: 190 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:37:48,307 WARN L227 SmtUtils]: Spent 18.36s on a formula simplification that was a NOOP. DAG size: 151 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:37:58,276 WARN L227 SmtUtils]: Spent 9.48s on a formula simplification. DAG size of input: 195 DAG size of output: 132 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:38:07,796 WARN L227 SmtUtils]: Spent 8.95s on a formula simplification. DAG size of input: 199 DAG size of output: 121 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:38:26,793 WARN L227 SmtUtils]: Spent 18.33s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:38:37,273 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:44,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:46,812 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:48,816 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:50,825 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:52,840 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:54,845 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:56,853 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:58,856 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:00,863 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:05,344 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:07,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:09,175 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:11,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:13,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:14,993 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:17,017 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:18,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:20,843 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:22,857 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:24,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:26,886 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:28,899 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:37,728 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:12,576 INFO L93 Difference]: Finished difference Result 979 states and 1627 transitions. [2021-11-13 02:40:12,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-13 02:40:12,576 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 38 states have internal predecessors, (152), 11 states have call successors, (35), 4 states have call predecessors, (35), 9 states have return successors, (36), 8 states have call predecessors, (36), 11 states have call successors, (36) Word has length 130 [2021-11-13 02:40:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:12,585 INFO L225 Difference]: With dead ends: 979 [2021-11-13 02:40:12,585 INFO L226 Difference]: Without dead ends: 811 [2021-11-13 02:40:12,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 722 SyntacticMatches, 23 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2010 ImplicationChecksByTransitivity, 366.3s TimeCoverageRelationStatistics Valid=954, Invalid=7233, Unknown=3, NotChecked=0, Total=8190 [2021-11-13 02:40:12,591 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 556 mSDsluCounter, 5596 mSDsCounter, 0 mSdLazyCounter, 3705 mSolverCounterSat, 326 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113011.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 5951 SdHoareTripleChecker+Invalid, 5052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.69ms SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 3705 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 992 IncrementalHoareTripleChecker+Unchecked, 120947.94ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:12,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 5951 Invalid, 5052 Unknown, 0 Unchecked, 41.69ms Time], IncrementalHoareTripleChecker [326 Valid, 3705 Invalid, 29 Unknown, 992 Unchecked, 120947.94ms Time] [2021-11-13 02:40:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-11-13 02:40:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 385. [2021-11-13 02:40:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 242 states have (on average 1.1611570247933884) internal successors, (281), 247 states have internal predecessors, (281), 121 states have call successors, (121), 17 states have call predecessors, (121), 21 states have return successors, (212), 120 states have call predecessors, (212), 120 states have call successors, (212) [2021-11-13 02:40:12,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 614 transitions. [2021-11-13 02:40:12,665 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 614 transitions. Word has length 130 [2021-11-13 02:40:12,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:12,665 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 614 transitions. [2021-11-13 02:40:12,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 38 states have internal predecessors, (152), 11 states have call successors, (35), 4 states have call predecessors, (35), 9 states have return successors, (36), 8 states have call predecessors, (36), 11 states have call successors, (36) [2021-11-13 02:40:12,666 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 614 transitions. [2021-11-13 02:40:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 02:40:12,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:12,670 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:12,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:12,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:13,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:13,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:13,284 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:13,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:13,285 INFO L85 PathProgramCache]: Analyzing trace with hash 583599087, now seen corresponding path program 1 times [2021-11-13 02:40:13,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:13,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874600173] [2021-11-13 02:40:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:13,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:13,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:13,289 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:13,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789e073c-c612-416f-b6a1-ad4801968de8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process