./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/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_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/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_82df9cac-23b5-437c-bf57-220a4f8494cf/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 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:19:19,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:19:19,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:19:19,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:19:19,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:19:19,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:19:19,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:19:19,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:19:19,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:19:19,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:19:19,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:19:19,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:19:19,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:19:19,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:19:19,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:19:19,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:19:19,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:19:19,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:19:19,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:19:19,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:19:19,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:19:19,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:19:19,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:19:19,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:19:19,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:19:19,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:19:19,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:19:19,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:19:19,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:19:19,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:19:19,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:19:19,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:19:19,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:19:19,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:19:19,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:19:19,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:19:19,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:19:19,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:19:19,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:19:19,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:19:19,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:19:19,824 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:19:19,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:19:19,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:19:19,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:19:19,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:19:19,861 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:19:19,861 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:19:19,862 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:19:19,862 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:19:19,863 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:19:19,863 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:19:19,863 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:19:19,864 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:19:19,864 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:19:19,864 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:19:19,865 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:19:19,865 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:19:19,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:19:19,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:19:19,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:19:19,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:19:19,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:19:19,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:19:19,868 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:19:19,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:19:19,868 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:19:19,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:19:19,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:19:19,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:19:19,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:19:19,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:19:19,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:19:19,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:19:19,871 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:19:19,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:19:19,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:19:19,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:19:19,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:19:19,873 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_82df9cac-23b5-437c-bf57-220a4f8494cf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2021-11-12 23:19:20,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:19:20,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:19:20,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:19:20,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:19:20,196 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:19:20,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-12 23:19:20,255 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/data/e29b52174/94bd2fe7d5ac469e98529cd2926394cf/FLAGd365dac80 [2021-11-12 23:19:21,211 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:19:21,212 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-12 23:19:21,281 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/data/e29b52174/94bd2fe7d5ac469e98529cd2926394cf/FLAGd365dac80 [2021-11-12 23:19:21,601 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/data/e29b52174/94bd2fe7d5ac469e98529cd2926394cf [2021-11-12 23:19:21,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:19:21,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:19:21,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:19:21,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:19:21,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:19:21,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:19:21" (1/1) ... [2021-11-12 23:19:21,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@89ef2ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:21, skipping insertion in model container [2021-11-12 23:19:21,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:19:21" (1/1) ... [2021-11-12 23:19:21,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:19:21,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:19:22,157 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_82df9cac-23b5-437c-bf57-220a4f8494cf/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-12 23:19:22,164 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_82df9cac-23b5-437c-bf57-220a4f8494cf/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-12 23:19:22,187 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:19:22,193 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:19:23,131 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:23,132 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:23,133 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:23,134 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:23,144 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:23,185 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:23,187 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:23,195 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:23,200 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:23,203 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:23,209 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:23,210 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:23,210 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:23,588 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:19:23,590 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:19:23,591 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:19:23,593 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:19:23,594 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:19:23,595 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:19:23,596 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:19:23,597 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:19:23,598 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:19:23,599 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:19:23,779 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:19:23,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:19:23,854 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:19:23,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3ca954ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:23, skipping insertion in model container [2021-11-12 23:19:23,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:19:23,855 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:19:23,858 INFO L158 Benchmark]: Toolchain (without parser) took 2251.11ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 44.8MB in the beginning and 77.9MB in the end (delta: -33.1MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. [2021-11-12 23:19:23,859 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 88.1MB. Free memory is still 67.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:19:23,860 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2247.90ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 44.6MB in the beginning and 77.9MB in the end (delta: -33.3MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. [2021-11-12 23:19:23,862 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 88.1MB. Free memory is still 67.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2247.90ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 44.6MB in the beginning and 77.9MB in the end (delta: -33.3MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7037]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/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_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/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_82df9cac-23b5-437c-bf57-220a4f8494cf/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 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:19:26,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:19:26,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:19:26,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:19:26,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:19:26,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:19:26,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:19:26,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:19:26,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:19:26,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:19:26,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:19:26,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:19:26,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:19:26,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:19:26,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:19:26,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:19:26,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:19:26,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:19:26,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:19:26,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:19:26,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:19:26,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:19:26,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:19:26,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:19:26,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:19:26,587 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:19:26,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:19:26,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:19:26,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:19:26,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:19:26,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:19:26,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:19:26,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:19:26,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:19:26,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:19:26,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:19:26,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:19:26,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:19:26,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:19:26,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:19:26,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:19:26,605 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:19:26,657 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:19:26,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:19:26,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:19:26,659 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:19:26,659 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:19:26,660 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:19:26,660 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:19:26,660 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:19:26,660 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:19:26,660 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:19:26,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:19:26,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:19:26,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:19:26,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:19:26,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:19:26,665 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:19:26,665 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:19:26,665 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:19:26,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:19:26,666 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:19:26,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:19:26,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:19:26,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:19:26,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:19:26,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:19:26,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:19:26,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:19:26,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:19:26,668 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:19:26,668 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:19:26,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:19:26,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:19:26,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:19:26,669 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_82df9cac-23b5-437c-bf57-220a4f8494cf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2021-11-12 23:19:27,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:19:27,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:19:27,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:19:27,200 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:19:27,201 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:19:27,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-12 23:19:27,289 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/data/eb9d3a0d2/20341b7899da46d6a6a67f547161b160/FLAGbf8b56ee1 [2021-11-12 23:19:28,338 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:19:28,339 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-12 23:19:28,396 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/data/eb9d3a0d2/20341b7899da46d6a6a67f547161b160/FLAGbf8b56ee1 [2021-11-12 23:19:28,721 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/data/eb9d3a0d2/20341b7899da46d6a6a67f547161b160 [2021-11-12 23:19:28,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:19:28,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:19:28,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:19:28,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:19:28,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:19:28,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:19:28" (1/1) ... [2021-11-12 23:19:28,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bccf43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:28, skipping insertion in model container [2021-11-12 23:19:28,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:19:28" (1/1) ... [2021-11-12 23:19:28,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:19:28,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:19:29,348 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_82df9cac-23b5-437c-bf57-220a4f8494cf/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-12 23:19:29,357 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_82df9cac-23b5-437c-bf57-220a4f8494cf/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-12 23:19:29,381 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:19:29,388 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:19:30,533 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:30,534 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:30,535 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:30,537 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:30,538 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:30,560 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:30,561 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:30,564 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:30,565 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:30,567 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:30,569 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:30,570 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:30,571 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,061 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:19:31,063 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:19:31,064 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:19:31,066 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:19:31,068 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:19:31,069 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:19:31,070 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:19:31,071 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:19:31,072 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:19:31,073 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:19:31,281 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:19:31,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:19:31,380 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:19:31,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:19:31,423 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_82df9cac-23b5-437c-bf57-220a4f8494cf/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-12 23:19:31,424 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_82df9cac-23b5-437c-bf57-220a4f8494cf/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-12 23:19:31,425 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:19:31,426 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:19:31,471 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,472 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,473 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,473 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,474 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,482 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,483 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,484 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,485 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,486 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,487 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,488 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,488 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,532 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:19:31,536 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:19:31,537 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:19:31,538 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:19:31,539 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:19:31,540 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:19:31,540 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:19:31,541 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:19:31,541 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:19:31,542 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:19:31,569 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:19:31,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:19:31,597 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:19:31,612 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_82df9cac-23b5-437c-bf57-220a4f8494cf/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-12 23:19:31,613 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_82df9cac-23b5-437c-bf57-220a4f8494cf/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-12 23:19:31,615 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:19:31,616 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:19:31,692 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,693 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,693 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,694 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,695 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,709 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,710 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,711 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,712 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,713 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,714 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,715 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,715 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:19:31,768 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:19:31,769 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:19:31,770 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:19:31,771 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:19:31,772 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:19:31,773 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:19:31,774 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:19:31,775 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:19:31,776 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:19:31,776 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:19:31,824 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:19:31,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:19:32,148 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:19:32,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:32 WrapperNode [2021-11-12 23:19:32,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:19:32,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:19:32,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:19:32,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:19:32,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:32" (1/1) ... [2021-11-12 23:19:32,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:32" (1/1) ... [2021-11-12 23:19:32,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:19:32,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:19:32,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:19:32,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:19:32,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:32" (1/1) ... [2021-11-12 23:19:32,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:32" (1/1) ... [2021-11-12 23:19:32,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:32" (1/1) ... [2021-11-12 23:19:32,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:32" (1/1) ... [2021-11-12 23:19:32,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:32" (1/1) ... [2021-11-12 23:19:32,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:32" (1/1) ... [2021-11-12 23:19:32,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:32" (1/1) ... [2021-11-12 23:19:32,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:19:32,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:19:32,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:19:32,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:19:32,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:32" (1/1) ... [2021-11-12 23:19:32,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:19:32,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:19:32,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:19:32,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:19:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:19:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:19:32,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:19:32,559 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:19:32,559 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-12 23:19:32,560 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-12 23:19:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:19:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-12 23:19:32,561 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-12 23:19:32,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:19:32,561 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_front [2021-11-12 23:19:32,561 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_front [2021-11-12 23:19:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:19:32,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:19:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-12 23:19:32,562 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-12 23:19:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:19:32,563 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:19:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:19:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:19:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:19:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-12 23:19:32,564 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-12 23:19:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-12 23:19:32,564 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-12 23:19:33,490 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:19:33,490 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:19:33,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:19:33 BoogieIcfgContainer [2021-11-12 23:19:33,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:19:33,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:19:33,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:19:33,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:19:33,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:19:28" (1/3) ... [2021-11-12 23:19:33,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a458fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:19:33, skipping insertion in model container [2021-11-12 23:19:33,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:19:32" (2/3) ... [2021-11-12 23:19:33,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a458fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:19:33, skipping insertion in model container [2021-11-12 23:19:33,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:19:33" (3/3) ... [2021-11-12 23:19:33,502 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2021-11-12 23:19:33,510 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:19:33,511 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:19:33,582 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:19:33,589 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:19:33,589 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:19:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-12 23:19:33,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 23:19:33,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:33,622 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:33,623 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:33,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1286081961, now seen corresponding path program 1 times [2021-11-12 23:19:33,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:33,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555874788] [2021-11-12 23:19:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:33,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:33,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:33,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:33,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:19:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:33,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:19:33,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:19:34,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 23:19:34,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:34,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555874788] [2021-11-12 23:19:34,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555874788] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:34,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:19:34,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-12 23:19:34,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454673333] [2021-11-12 23:19:34,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:34,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:19:34,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:34,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:19:34,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:19:34,666 INFO L87 Difference]: Start difference. First operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:19:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:34,725 INFO L93 Difference]: Finished difference Result 188 states and 271 transitions. [2021-11-12 23:19:34,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:19:34,728 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 84 [2021-11-12 23:19:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:34,740 INFO L225 Difference]: With dead ends: 188 [2021-11-12 23:19:34,741 INFO L226 Difference]: Without dead ends: 93 [2021-11-12 23:19:34,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:19:34,751 INFO L933 BasicCegarLoop]: 127 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, 127 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.25ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:34,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 3.25ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:19:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-12 23:19:34,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-12 23:19:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-12 23:19:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-11-12 23:19:34,818 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 84 [2021-11-12 23:19:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:34,819 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-11-12 23:19:34,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:19:34,820 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-11-12 23:19:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 23:19:34,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:34,826 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:34,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:35,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:35,040 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:35,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:35,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1287183985, now seen corresponding path program 1 times [2021-11-12 23:19:35,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:35,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145823949] [2021-11-12 23:19:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:35,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:35,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:35,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:35,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:19:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:35,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:19:35,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:19:35,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-12 23:19:35,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:35,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145823949] [2021-11-12 23:19:35,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145823949] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:35,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:19:35,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-12 23:19:35,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937624681] [2021-11-12 23:19:35,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:35,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:19:35,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:35,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:19:35,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:19:35,925 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:19:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:36,080 INFO L93 Difference]: Finished difference Result 169 states and 224 transitions. [2021-11-12 23:19:36,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:19:36,081 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 84 [2021-11-12 23:19:36,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:36,089 INFO L225 Difference]: With dead ends: 169 [2021-11-12 23:19:36,089 INFO L226 Difference]: Without dead ends: 95 [2021-11-12 23:19:36,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:19:36,096 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 2 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.02ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:36,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 563 Invalid, 41 Unknown, 0 Unchecked, 16.02ms Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 74.07ms Time] [2021-11-12 23:19:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-12 23:19:36,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-12 23:19:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 63 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-12 23:19:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2021-11-12 23:19:36,142 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 84 [2021-11-12 23:19:36,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:36,142 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2021-11-12 23:19:36,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:19:36,143 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2021-11-12 23:19:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:19:36,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:36,154 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:36,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:36,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:36,375 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash 415994251, now seen corresponding path program 1 times [2021-11-12 23:19:36,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:36,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473666047] [2021-11-12 23:19:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:36,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:36,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:36,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:36,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:19:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:36,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:19:36,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:19:37,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-12 23:19:37,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:37,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473666047] [2021-11-12 23:19:37,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473666047] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:37,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:19:37,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2021-11-12 23:19:37,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806318014] [2021-11-12 23:19:37,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:37,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:19:37,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:37,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:19:37,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:19:37,516 INFO L87 Difference]: Start difference. First operand 95 states and 125 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:19:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:37,981 INFO L93 Difference]: Finished difference Result 174 states and 231 transitions. [2021-11-12 23:19:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:19:37,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 86 [2021-11-12 23:19:37,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:37,985 INFO L225 Difference]: With dead ends: 174 [2021-11-12 23:19:37,985 INFO L226 Difference]: Without dead ends: 95 [2021-11-12 23:19:37,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:19:37,988 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 50 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 292.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.55ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 335.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:37,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 663 Invalid, 133 Unknown, 0 Unchecked, 11.55ms Time], IncrementalHoareTripleChecker [24 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 335.47ms Time] [2021-11-12 23:19:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-12 23:19:38,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-12 23:19:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 63 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-12 23:19:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 124 transitions. [2021-11-12 23:19:38,006 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 124 transitions. Word has length 86 [2021-11-12 23:19:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:38,006 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 124 transitions. [2021-11-12 23:19:38,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:19:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 124 transitions. [2021-11-12 23:19:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 23:19:38,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:38,010 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:38,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:38,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:38,225 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:38,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:38,226 INFO L85 PathProgramCache]: Analyzing trace with hash 426166840, now seen corresponding path program 1 times [2021-11-12 23:19:38,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:38,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733473815] [2021-11-12 23:19:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:38,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:38,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:38,230 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:38,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:19:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:38,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:19:38,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:19:38,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-12 23:19:39,282 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:39,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733473815] [2021-11-12 23:19:39,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733473815] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:39,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:19:39,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 12 [2021-11-12 23:19:39,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233563911] [2021-11-12 23:19:39,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:39,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:19:39,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:39,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:19:39,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:19:39,285 INFO L87 Difference]: Start difference. First operand 95 states and 124 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:19:39,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:39,709 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2021-11-12 23:19:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:19:39,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2021-11-12 23:19:39,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:39,718 INFO L225 Difference]: With dead ends: 183 [2021-11-12 23:19:39,719 INFO L226 Difference]: Without dead ends: 103 [2021-11-12 23:19:39,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:19:39,721 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 76 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 274.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.77ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 318.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:39,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 752 Invalid, 175 Unknown, 0 Unchecked, 6.77ms Time], IncrementalHoareTripleChecker [32 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 318.66ms Time] [2021-11-12 23:19:39,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-12 23:19:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2021-11-12 23:19:39,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 64 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-12 23:19:39,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2021-11-12 23:19:39,743 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 88 [2021-11-12 23:19:39,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:39,744 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2021-11-12 23:19:39,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:19:39,745 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2021-11-12 23:19:39,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 23:19:39,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:39,747 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:39,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-12 23:19:39,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:39,952 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:39,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:39,953 INFO L85 PathProgramCache]: Analyzing trace with hash 134211126, now seen corresponding path program 1 times [2021-11-12 23:19:39,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:39,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16835852] [2021-11-12 23:19:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:39,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:39,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:39,955 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:39,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:19:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:40,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:19:40,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:19:40,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-12 23:19:40,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:40,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16835852] [2021-11-12 23:19:40,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16835852] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:40,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:19:40,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3] total 9 [2021-11-12 23:19:40,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144180024] [2021-11-12 23:19:40,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:40,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:19:40,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:19:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:19:40,843 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:19:41,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:41,185 INFO L93 Difference]: Finished difference Result 179 states and 240 transitions. [2021-11-12 23:19:41,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:19:41,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 89 [2021-11-12 23:19:41,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:41,190 INFO L225 Difference]: With dead ends: 179 [2021-11-12 23:19:41,190 INFO L226 Difference]: Without dead ends: 102 [2021-11-12 23:19:41,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:19:41,192 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 58 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 215.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.10ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 256.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:41,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 561 Invalid, 127 Unknown, 0 Unchecked, 5.10ms Time], IncrementalHoareTripleChecker [29 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 256.82ms Time] [2021-11-12 23:19:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-12 23:19:41,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-11-12 23:19:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 65 states have internal predecessors, (77), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-12 23:19:41,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2021-11-12 23:19:41,221 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 89 [2021-11-12 23:19:41,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:41,223 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2021-11-12 23:19:41,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:19:41,225 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2021-11-12 23:19:41,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 23:19:41,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:41,227 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:41,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:41,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:41,448 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:41,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:41,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2072143320, now seen corresponding path program 1 times [2021-11-12 23:19:41,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:41,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810815272] [2021-11-12 23:19:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:41,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:41,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:41,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:41,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:19:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:41,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:19:41,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:19:41,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-12 23:19:42,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:42,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810815272] [2021-11-12 23:19:42,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810815272] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:42,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:19:42,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 23:19:42,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214654533] [2021-11-12 23:19:42,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:42,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:19:42,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:42,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:19:42,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:19:42,236 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 23:19:42,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:42,355 INFO L93 Difference]: Finished difference Result 178 states and 233 transitions. [2021-11-12 23:19:42,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:19:42,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 97 [2021-11-12 23:19:42,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:42,358 INFO L225 Difference]: With dead ends: 178 [2021-11-12 23:19:42,358 INFO L226 Difference]: Without dead ends: 100 [2021-11-12 23:19:42,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:19:42,360 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 4 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.71ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:42,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 681 Invalid, 55 Unknown, 0 Unchecked, 3.71ms Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 78.81ms Time] [2021-11-12 23:19:42,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-12 23:19:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2021-11-12 23:19:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.21875) internal successors, (78), 66 states have internal predecessors, (78), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-12 23:19:42,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2021-11-12 23:19:42,390 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 97 [2021-11-12 23:19:42,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:42,391 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2021-11-12 23:19:42,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 23:19:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2021-11-12 23:19:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:19:42,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:42,393 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:42,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:42,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:42,614 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:42,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:42,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1447444667, now seen corresponding path program 1 times [2021-11-12 23:19:42,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:42,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637708614] [2021-11-12 23:19:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:42,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:42,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:42,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:42,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:19:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:42,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:19:42,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:19:44,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-12 23:19:45,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:45,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637708614] [2021-11-12 23:19:45,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637708614] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:19:45,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [118494964] [2021-11-12 23:19:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:45,107 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:19:45,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:19:45,112 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:19:45,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 23:19:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:45,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:19:45,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:19:45,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-12 23:19:46,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [118494964] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:19:46,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:19:46,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8, 8] total 23 [2021-11-12 23:19:46,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072836692] [2021-11-12 23:19:46,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:46,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:19:46,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:46,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:19:46,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:19:46,253 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-12 23:19:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:46,432 INFO L93 Difference]: Finished difference Result 183 states and 239 transitions. [2021-11-12 23:19:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:19:46,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 99 [2021-11-12 23:19:46,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:46,434 INFO L225 Difference]: With dead ends: 183 [2021-11-12 23:19:46,434 INFO L226 Difference]: Without dead ends: 104 [2021-11-12 23:19:46,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:19:46,436 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 8 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.15ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:46,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 783 Invalid, 70 Unknown, 0 Unchecked, 3.15ms Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 74.86ms Time] [2021-11-12 23:19:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-12 23:19:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2021-11-12 23:19:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2021-11-12 23:19:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2021-11-12 23:19:46,454 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 99 [2021-11-12 23:19:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:46,454 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2021-11-12 23:19:46,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-12 23:19:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2021-11-12 23:19:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-12 23:19:46,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:46,457 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:46,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:46,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:46,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:46,870 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:46,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:46,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2113170743, now seen corresponding path program 1 times [2021-11-12 23:19:46,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:46,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960878507] [2021-11-12 23:19:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:46,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:46,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:46,874 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:46,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:19:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:47,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 23:19:47,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:50,062 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_6 (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_6) (_ bv0 64)) (_ bv16 64)))) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_6 (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_6) (_ bv0 64)) v_aws_linked_list_front_~list.base_BEFORE_CALL_6)))) is different from true [2021-11-12 23:19:58,317 WARN L227 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:20:06,746 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:20:15,015 WARN L227 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:20:23,463 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:20:31,884 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:20:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:20:32,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:38,391 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-12 23:20:38,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-12 23:20:38,408 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-12 23:20:38,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2021-11-12 23:20:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 23:20:38,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:38,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960878507] [2021-11-12 23:20:38,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960878507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:20:38,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [913488005] [2021-11-12 23:20:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:38,477 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:20:38,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:20:38,484 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:20:38,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:20:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:39,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 23:20:39,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:47,739 WARN L227 SmtUtils]: Spent 8.45s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 23:20:47,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:20:47,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 76 [2021-11-12 23:20:47,771 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-12 23:20:47,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 90 [2021-11-12 23:21:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:21:41,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 23:21:45,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [913488005] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:21:45,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563085559] [2021-11-12 23:21:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:45,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:21:45,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:21:45,273 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:21:45,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-12 23:21:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:45,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:21:45,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:21:58,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:01,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:22:01,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-12 23:22:01,971 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 23:22:01,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-12 23:22:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 23:22:02,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563085559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:22:02,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:22:02,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 16, 9, 14, 9] total 60 [2021-11-12 23:22:02,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637304370] [2021-11-12 23:22:02,098 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:22:02,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-12 23:22:02,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:02,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-12 23:22:02,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=3167, Unknown=7, NotChecked=114, Total=3540 [2021-11-12 23:22:02,103 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand has 60 states, 54 states have (on average 4.388888888888889) internal successors, (237), 54 states have internal predecessors, (237), 24 states have call successors, (56), 12 states have call predecessors, (56), 19 states have return successors, (52), 20 states have call predecessors, (52), 22 states have call successors, (52) [2021-11-12 23:22:55,455 WARN L227 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:23:07,916 WARN L227 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:23:16,426 WARN L227 SmtUtils]: Spent 8.19s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:23:24,897 WARN L227 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:23:33,368 WARN L227 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:23:55,927 WARN L227 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:24:11,040 WARN L227 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:24:24,003 WARN L227 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:25:06,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:06,144 INFO L93 Difference]: Finished difference Result 347 states and 460 transitions. [2021-11-12 23:25:06,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-12 23:25:06,146 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 54 states have (on average 4.388888888888889) internal successors, (237), 54 states have internal predecessors, (237), 24 states have call successors, (56), 12 states have call predecessors, (56), 19 states have return successors, (52), 20 states have call predecessors, (52), 22 states have call successors, (52) Word has length 100 [2021-11-12 23:25:06,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:06,149 INFO L225 Difference]: With dead ends: 347 [2021-11-12 23:25:06,149 INFO L226 Difference]: Without dead ends: 251 [2021-11-12 23:25:06,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 537 SyntacticMatches, 19 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2677 ImplicationChecksByTransitivity, 271.6s TimeCoverageRelationStatistics Valid=591, Invalid=7547, Unknown=56, NotChecked=178, Total=8372 [2021-11-12 23:25:06,152 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 226 mSDsluCounter, 2715 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1864.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 2834 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.48ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 642 IncrementalHoareTripleChecker+Unchecked, 2143.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:06,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 2834 Invalid, 1024 Unknown, 0 Unchecked, 14.48ms Time], IncrementalHoareTripleChecker [0 Valid, 382 Invalid, 0 Unknown, 642 Unchecked, 2143.51ms Time] [2021-11-12 23:25:06,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-12 23:25:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 220. [2021-11-12 23:25:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 163 states have (on average 1.294478527607362) internal successors, (211), 166 states have internal predecessors, (211), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (45), 35 states have call predecessors, (45), 35 states have call successors, (45) [2021-11-12 23:25:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 292 transitions. [2021-11-12 23:25:06,181 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 292 transitions. Word has length 100 [2021-11-12 23:25:06,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:06,181 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 292 transitions. [2021-11-12 23:25:06,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 54 states have (on average 4.388888888888889) internal successors, (237), 54 states have internal predecessors, (237), 24 states have call successors, (56), 12 states have call predecessors, (56), 19 states have return successors, (52), 20 states have call predecessors, (52), 22 states have call successors, (52) [2021-11-12 23:25:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 292 transitions. [2021-11-12 23:25:06,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 23:25:06,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:06,184 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:06,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:06,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:06,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:06,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:06,808 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:06,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:06,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2030089748, now seen corresponding path program 1 times [2021-11-12 23:25:06,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:06,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34678211] [2021-11-12 23:25:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:06,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:06,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:06,811 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:06,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:25:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:07,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 23:25:07,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:07,168 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-12 23:25:07,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-12 23:25:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-12 23:25:09,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:10,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2021-11-12 23:25:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 23:25:10,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:10,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34678211] [2021-11-12 23:25:10,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34678211] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:10,334 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:10,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [] total 21 [2021-11-12 23:25:10,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064226980] [2021-11-12 23:25:10,334 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:10,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 23:25:10,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:10,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 23:25:10,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:25:10,336 INFO L87 Difference]: Start difference. First operand 220 states and 292 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 19 states have internal predecessors, (104), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-12 23:25:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:12,757 INFO L93 Difference]: Finished difference Result 559 states and 758 transitions. [2021-11-12 23:25:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 23:25:12,758 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 19 states have internal predecessors, (104), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 111 [2021-11-12 23:25:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:12,762 INFO L225 Difference]: With dead ends: 559 [2021-11-12 23:25:12,762 INFO L226 Difference]: Without dead ends: 462 [2021-11-12 23:25:12,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 190 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:25:12,764 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 110 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1774.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.99ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 2063.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:12,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 1405 Invalid, 856 Unknown, 0 Unchecked, 7.99ms Time], IncrementalHoareTripleChecker [56 Valid, 569 Invalid, 0 Unknown, 231 Unchecked, 2063.66ms Time] [2021-11-12 23:25:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-12 23:25:12,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 431. [2021-11-12 23:25:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 328 states have (on average 1.3018292682926829) internal successors, (427), 335 states have internal predecessors, (427), 65 states have call successors, (65), 33 states have call predecessors, (65), 37 states have return successors, (83), 62 states have call predecessors, (83), 64 states have call successors, (83) [2021-11-12 23:25:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 575 transitions. [2021-11-12 23:25:12,810 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 575 transitions. Word has length 111 [2021-11-12 23:25:12,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:12,811 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 575 transitions. [2021-11-12 23:25:12,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 19 states have internal predecessors, (104), 9 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-12 23:25:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 575 transitions. [2021-11-12 23:25:12,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 23:25:12,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:12,814 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:12,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:13,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:13,016 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:13,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1637062738, now seen corresponding path program 1 times [2021-11-12 23:25:13,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:13,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921435931] [2021-11-12 23:25:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:13,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:13,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:13,018 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:13,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:25:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:13,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 23:25:13,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:25:17,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:20,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:25:20,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-12 23:25:20,872 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 23:25:20,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-12 23:25:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 23:25:20,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:20,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921435931] [2021-11-12 23:25:20,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921435931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:20,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [977663306] [2021-11-12 23:25:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:20,960 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:20,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:25:20,962 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:25:20,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:25:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:21,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-12 23:25:21,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:21,706 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-12 23:25:21,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-12 23:25:21,728 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-12 23:25:21,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-12 23:25:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 55 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:25:34,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 23:25:35,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [977663306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:35,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293316583] [2021-11-12 23:25:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:35,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:35,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:25:35,944 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:25:35,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-12 23:25:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:36,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:25:36,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:25:38,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:41,254 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-12 23:25:41,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2021-11-12 23:25:41,264 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-12 23:25:41,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-11-12 23:25:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 23:25:41,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293316583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:41,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:25:41,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 18, 11, 16, 11] total 40 [2021-11-12 23:25:41,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13840822] [2021-11-12 23:25:41,340 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:25:41,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-12 23:25:41,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:41,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-12 23:25:41,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2021-11-12 23:25:41,342 INFO L87 Difference]: Start difference. First operand 431 states and 575 transitions. Second operand has 40 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 15 states have call successors, (38), 9 states have call predecessors, (38), 11 states have return successors, (34), 13 states have call predecessors, (34), 14 states have call successors, (34) [2021-11-12 23:25:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:43,884 INFO L93 Difference]: Finished difference Result 1181 states and 1607 transitions. [2021-11-12 23:25:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-12 23:25:43,885 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 15 states have call successors, (38), 9 states have call predecessors, (38), 11 states have return successors, (34), 13 states have call predecessors, (34), 14 states have call successors, (34) Word has length 111 [2021-11-12 23:25:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:43,893 INFO L225 Difference]: With dead ends: 1181 [2021-11-12 23:25:43,893 INFO L226 Difference]: Without dead ends: 1063 [2021-11-12 23:25:43,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 590 SyntacticMatches, 33 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=249, Invalid=1821, Unknown=0, NotChecked=0, Total=2070 [2021-11-12 23:25:43,895 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 253 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1336.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.66ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 1553.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:43,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 2257 Invalid, 779 Unknown, 0 Unchecked, 8.66ms Time], IncrementalHoareTripleChecker [5 Valid, 426 Invalid, 0 Unknown, 348 Unchecked, 1553.71ms Time] [2021-11-12 23:25:43,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-11-12 23:25:44,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 931. [2021-11-12 23:25:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 743 states have (on average 1.3283983849259757) internal successors, (987), 764 states have internal predecessors, (987), 110 states have call successors, (110), 61 states have call predecessors, (110), 77 states have return successors, (172), 105 states have call predecessors, (172), 109 states have call successors, (172) [2021-11-12 23:25:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1269 transitions. [2021-11-12 23:25:44,037 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1269 transitions. Word has length 111 [2021-11-12 23:25:44,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:44,039 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1269 transitions. [2021-11-12 23:25:44,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 15 states have call successors, (38), 9 states have call predecessors, (38), 11 states have return successors, (34), 13 states have call predecessors, (34), 14 states have call successors, (34) [2021-11-12 23:25:44,039 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1269 transitions. [2021-11-12 23:25:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 23:25:44,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:44,045 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:44,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:44,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:44,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:44,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:44,656 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:44,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:44,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1895228176, now seen corresponding path program 1 times [2021-11-12 23:25:44,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:44,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749716690] [2021-11-12 23:25:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:44,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:44,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:44,658 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:44,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:25:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:44,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 23:25:44,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:25:47,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:48,094 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-12 23:25:48,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-12 23:25:48,112 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-12 23:25:48,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-12 23:25:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-12 23:25:48,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:48,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749716690] [2021-11-12 23:25:48,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749716690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:48,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1720175939] [2021-11-12 23:25:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:48,285 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:48,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:25:48,286 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:25:48,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82df9cac-23b5-437c-bf57-220a4f8494cf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 23:25:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:48,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-12 23:25:48,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:55,103 WARN L227 SmtUtils]: Spent 6.29s on a formula simplification. DAG size of input: 19 DAG size of output: 7 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 23:25:55,104 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-12 23:25:55,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-12 23:26:03,504 WARN L227 SmtUtils]: Spent 8.40s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-12 23:26:03,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:26:03,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 84