./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/memset_using_uint64_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_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/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_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/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_f072c97b-fe5c-4d38-b937-e70b61bdc195/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 9ff439c9da308e48e314eaeb6f620d0560f5430b3c601570b5afd8d635a5b965 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:31:55,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:31:55,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:31:55,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:31:55,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:31:55,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:31:55,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:31:55,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:31:55,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:31:55,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:31:55,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:31:55,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:31:55,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:31:55,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:31:55,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:31:55,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:31:55,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:31:55,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:31:55,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:31:55,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:31:55,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:31:55,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:31:55,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:31:55,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:31:55,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:31:55,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:31:55,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:31:55,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:31:55,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:31:55,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:31:55,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:31:55,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:31:55,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:31:55,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:31:55,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:31:55,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:31:55,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:31:55,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:31:55,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:31:55,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:31:55,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:31:55,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 02:31:55,718 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:31:55,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:31:55,723 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:31:55,724 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:31:55,724 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:31:55,725 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:31:55,725 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:31:55,725 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:31:55,725 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:31:55,726 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:31:55,727 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:31:55,727 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:31:55,727 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:31:55,727 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:31:55,728 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:31:55,728 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:31:55,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:31:55,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:31:55,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:31:55,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:31:55,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:31:55,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:31:55,730 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:31:55,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:31:55,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:31:55,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:31:55,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:31:55,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:31:55,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:31:55,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:31:55,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:31:55,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:31:55,733 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:31:55,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:31:55,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:31:55,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:31:55,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:31:55,734 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_f072c97b-fe5c-4d38-b937-e70b61bdc195/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ff439c9da308e48e314eaeb6f620d0560f5430b3c601570b5afd8d635a5b965 [2021-11-13 02:31:56,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:31:56,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:31:56,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:31:56,084 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:31:56,085 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:31:56,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i [2021-11-13 02:31:56,157 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/data/af78f2fdf/f878dd824fdf4d078c1766daf83d1bbb/FLAGcaa769c4f [2021-11-13 02:31:56,975 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:31:56,976 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i [2021-11-13 02:31:57,019 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/data/af78f2fdf/f878dd824fdf4d078c1766daf83d1bbb/FLAGcaa769c4f [2021-11-13 02:31:57,047 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/data/af78f2fdf/f878dd824fdf4d078c1766daf83d1bbb [2021-11-13 02:31:57,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:31:57,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:31:57,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:31:57,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:31:57,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:31:57,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:31:57" (1/1) ... [2021-11-13 02:31:57,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c02d4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:57, skipping insertion in model container [2021-11-13 02:31:57,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:31:57" (1/1) ... [2021-11-13 02:31:57,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:31:57,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:31:57,422 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_f072c97b-fe5c-4d38-b937-e70b61bdc195/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4493,4506] [2021-11-13 02:31:57,427 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_f072c97b-fe5c-4d38-b937-e70b61bdc195/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4553,4566] [2021-11-13 02:31:57,446 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:31:57,451 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:31:58,136 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:58,137 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:58,138 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:58,139 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:58,140 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:58,154 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:58,155 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:58,157 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:58,157 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:58,159 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:58,160 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:58,161 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:58,162 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:58,345 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:31:58,346 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:31:58,347 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:31:58,349 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:31:58,350 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:31:58,351 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:31:58,352 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:31:58,352 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:31:58,353 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:31:58,354 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:31:58,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:31:58,438 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 02:31:58,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@12d0a4ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:58, skipping insertion in model container [2021-11-13 02:31:58,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:31:58,440 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:31:58,442 INFO L158 Benchmark]: Toolchain (without parser) took 1387.63ms. Allocated memory is still 94.4MB. Free memory was 69.9MB in the beginning and 46.6MB in the end (delta: 23.3MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. [2021-11-13 02:31:58,442 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 94.4MB. Free memory is still 69.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:31:58,443 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1382.97ms. Allocated memory is still 94.4MB. Free memory was 69.7MB in the beginning and 46.6MB in the end (delta: 23.1MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. [2021-11-13 02:31:58,445 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 94.4MB. Free memory is still 69.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1382.97ms. Allocated memory is still 94.4MB. Free memory was 69.7MB in the beginning and 46.6MB in the end (delta: 23.1MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5922]: 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_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/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_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/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_f072c97b-fe5c-4d38-b937-e70b61bdc195/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 9ff439c9da308e48e314eaeb6f620d0560f5430b3c601570b5afd8d635a5b965 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:32:00,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:32:00,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:32:00,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:32:00,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:32:00,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:32:00,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:32:00,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:32:00,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:32:00,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:32:00,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:32:00,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:32:00,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:32:00,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:32:00,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:32:00,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:32:00,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:32:00,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:32:00,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:32:00,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:32:00,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:32:00,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:32:00,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:32:00,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:32:00,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:32:00,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:32:00,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:32:00,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:32:00,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:32:00,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:32:00,813 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:32:00,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:32:00,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:32:00,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:32:00,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:32:00,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:32:00,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:32:00,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:32:00,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:32:00,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:32:00,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:32:00,828 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 02:32:00,871 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:32:00,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:32:00,873 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:32:00,873 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:32:00,873 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:32:00,874 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:32:00,874 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:32:00,874 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:32:00,875 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:32:00,875 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:32:00,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:32:00,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:32:00,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:32:00,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:32:00,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:32:00,878 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:32:00,879 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:32:00,879 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:32:00,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:32:00,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:32:00,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:32:00,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:32:00,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:32:00,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:32:00,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:00,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:32:00,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:32:00,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:32:00,881 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:32:00,882 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:32:00,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:32:00,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:32:00,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:32:00,883 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_f072c97b-fe5c-4d38-b937-e70b61bdc195/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ff439c9da308e48e314eaeb6f620d0560f5430b3c601570b5afd8d635a5b965 [2021-11-13 02:32:01,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:32:01,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:32:01,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:32:01,299 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:32:01,300 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:32:01,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i [2021-11-13 02:32:01,364 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/data/d47582a77/42b7ce5b53084021a64386f3b064e8ca/FLAG9291d8c1f [2021-11-13 02:32:02,195 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:32:02,195 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i [2021-11-13 02:32:02,245 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/data/d47582a77/42b7ce5b53084021a64386f3b064e8ca/FLAG9291d8c1f [2021-11-13 02:32:02,298 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/data/d47582a77/42b7ce5b53084021a64386f3b064e8ca [2021-11-13 02:32:02,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:32:02,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:32:02,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:02,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:32:02,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:32:02,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:02" (1/1) ... [2021-11-13 02:32:02,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25aa809a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:02, skipping insertion in model container [2021-11-13 02:32:02,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:02" (1/1) ... [2021-11-13 02:32:02,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:32:02,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:32:02,745 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_f072c97b-fe5c-4d38-b937-e70b61bdc195/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4493,4506] [2021-11-13 02:32:02,751 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_f072c97b-fe5c-4d38-b937-e70b61bdc195/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4553,4566] [2021-11-13 02:32:02,769 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:32:02,774 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:32:03,454 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:03,455 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:03,455 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:03,456 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:03,457 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:03,477 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:03,481 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:03,485 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:03,489 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:03,496 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:03,500 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:03,502 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:03,503 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:03,740 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:32:03,742 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:32:03,743 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:32:03,756 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:32:03,758 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:32:03,759 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:32:03,760 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:32:03,760 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:32:03,761 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:32:03,762 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:32:03,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:03,867 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:32:03,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:32:03,948 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_f072c97b-fe5c-4d38-b937-e70b61bdc195/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4493,4506] [2021-11-13 02:32:03,949 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_f072c97b-fe5c-4d38-b937-e70b61bdc195/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4553,4566] [2021-11-13 02:32:03,955 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:32:03,956 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:32:04,053 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,062 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,062 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,063 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,064 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,073 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,073 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,075 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,075 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,077 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,077 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,078 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,078 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,098 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:32:04,099 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:32:04,100 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:32:04,101 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:32:04,102 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:32:04,102 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:32:04,103 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:32:04,103 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:32:04,104 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:32:04,104 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:32:04,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:04,132 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:32:04,145 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_f072c97b-fe5c-4d38-b937-e70b61bdc195/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4493,4506] [2021-11-13 02:32:04,146 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_f072c97b-fe5c-4d38-b937-e70b61bdc195/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4553,4566] [2021-11-13 02:32:04,147 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:32:04,148 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:32:04,227 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,227 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,227 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,228 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,229 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,237 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,238 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,239 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,240 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,241 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,241 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,242 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,242 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:32:04,261 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:32:04,261 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:32:04,262 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:32:04,263 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:32:04,264 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:32:04,264 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:32:04,265 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:32:04,265 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:32:04,266 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:32:04,266 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:32:04,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:04,549 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:32:04,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:04 WrapperNode [2021-11-13 02:32:04,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:04,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:32:04,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:32:04,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:32:04,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:04" (1/1) ... [2021-11-13 02:32:04,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:04" (1/1) ... [2021-11-13 02:32:04,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:32:04,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:32:04,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:32:04,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:32:04,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:04" (1/1) ... [2021-11-13 02:32:04,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:04" (1/1) ... [2021-11-13 02:32:04,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:04" (1/1) ... [2021-11-13 02:32:04,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:04" (1/1) ... [2021-11-13 02:32:04,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:04" (1/1) ... [2021-11-13 02:32:04,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:04" (1/1) ... [2021-11-13 02:32:04,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:04" (1/1) ... [2021-11-13 02:32:04,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:32:04,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:32:04,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:32:04,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:32:04,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:04" (1/1) ... [2021-11-13 02:32:04,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:04,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:04,797 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:32:04,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:32:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:32:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:32:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 02:32:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 02:32:04,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 02:32:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:32:04,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:32:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 02:32:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 02:32:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 02:32:04,853 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 02:32:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:32:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 02:32:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 02:32:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2021-11-13 02:32:04,854 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2021-11-13 02:32:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-13 02:32:04,854 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-13 02:32:07,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:32:07,653 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 02:32:07,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:32:07 BoogieIcfgContainer [2021-11-13 02:32:07,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:32:07,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:32:07,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:32:07,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:32:07,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:32:02" (1/3) ... [2021-11-13 02:32:07,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662c4ef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:32:07, skipping insertion in model container [2021-11-13 02:32:07,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:04" (2/3) ... [2021-11-13 02:32:07,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662c4ef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:32:07, skipping insertion in model container [2021-11-13 02:32:07,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:32:07" (3/3) ... [2021-11-13 02:32:07,667 INFO L111 eAbstractionObserver]: Analyzing ICFG memset_using_uint64_harness.i [2021-11-13 02:32:07,673 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:32:07,674 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:32:07,736 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:32:07,745 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:32:07,745 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:32:07,767 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 54 states have internal predecessors, (71), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 02:32:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 02:32:07,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:07,776 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:07,776 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:07,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1430345650, now seen corresponding path program 1 times [2021-11-13 02:32:07,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:07,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883245898] [2021-11-13 02:32:07,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:07,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:07,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:07,808 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:07,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:32:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:08,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 02:32:08,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:32:08,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:32:08,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:08,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883245898] [2021-11-13 02:32:08,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883245898] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:08,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:08,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-13 02:32:08,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361432903] [2021-11-13 02:32:08,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:08,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:32:08,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:08,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:32:08,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:32:08,721 INFO L87 Difference]: Start difference. First operand has 70 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 54 states have internal predecessors, (71), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 02:32:08,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:08,766 INFO L93 Difference]: Finished difference Result 137 states and 191 transitions. [2021-11-13 02:32:08,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:32:08,769 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2021-11-13 02:32:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:08,779 INFO L225 Difference]: With dead ends: 137 [2021-11-13 02:32:08,779 INFO L226 Difference]: Without dead ends: 62 [2021-11-13 02:32:08,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:32:08,788 INFO L933 BasicCegarLoop]: 89 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, 89 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.52ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:08,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 1.52ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:32:08,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-13 02:32:08,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-13 02:32:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 48 states have internal predecessors, (60), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 02:32:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2021-11-13 02:32:08,840 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 45 [2021-11-13 02:32:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:08,840 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2021-11-13 02:32:08,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 02:32:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2021-11-13 02:32:08,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 02:32:08,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:08,844 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:08,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:09,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:09,058 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1361752392, now seen corresponding path program 1 times [2021-11-13 02:32:09,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:09,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144778127] [2021-11-13 02:32:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:09,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:09,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:09,066 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:09,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:32:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:09,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:32:09,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:09,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:10,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:10,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144778127] [2021-11-13 02:32:10,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144778127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:10,192 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:10,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-13 02:32:10,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192082168] [2021-11-13 02:32:10,194 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:10,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:32:10,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:10,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:32:10,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:32:10,199 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 02:32:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:10,793 INFO L93 Difference]: Finished difference Result 158 states and 203 transitions. [2021-11-13 02:32:10,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:32:10,795 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2021-11-13 02:32:10,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:10,800 INFO L225 Difference]: With dead ends: 158 [2021-11-13 02:32:10,801 INFO L226 Difference]: Without dead ends: 109 [2021-11-13 02:32:10,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:32:10,805 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 92 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 331.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.65ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 420.60ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:10,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 450 Invalid, 135 Unknown, 0 Unchecked, 12.65ms Time], IncrementalHoareTripleChecker [20 Valid, 99 Invalid, 0 Unknown, 16 Unchecked, 420.60ms Time] [2021-11-13 02:32:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-13 02:32:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 67. [2021-11-13 02:32:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 52 states have internal predecessors, (64), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:32:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-11-13 02:32:10,854 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 45 [2021-11-13 02:32:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:10,855 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-11-13 02:32:10,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 02:32:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-11-13 02:32:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 02:32:10,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:10,860 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:10,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:11,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:11,082 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:11,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:11,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1127776570, now seen corresponding path program 1 times [2021-11-13 02:32:11,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:11,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785521324] [2021-11-13 02:32:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:11,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:11,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:11,086 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:11,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:32:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:11,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:32:11,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:12,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:12,890 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:12,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785521324] [2021-11-13 02:32:12,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785521324] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:12,897 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:12,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 8] imperfect sequences [] total 12 [2021-11-13 02:32:12,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214075912] [2021-11-13 02:32:12,902 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:12,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:32:12,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:12,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:32:12,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:32:12,905 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 02:32:13,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:13,608 INFO L93 Difference]: Finished difference Result 155 states and 198 transitions. [2021-11-13 02:32:13,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:32:13,609 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2021-11-13 02:32:13,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:13,611 INFO L225 Difference]: With dead ends: 155 [2021-11-13 02:32:13,612 INFO L226 Difference]: Without dead ends: 110 [2021-11-13 02:32:13,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:32:13,614 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 47 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 467.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.55ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 527.07ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:13,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 516 Invalid, 171 Unknown, 0 Unchecked, 6.55ms Time], IncrementalHoareTripleChecker [13 Valid, 149 Invalid, 0 Unknown, 9 Unchecked, 527.07ms Time] [2021-11-13 02:32:13,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-13 02:32:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 71. [2021-11-13 02:32:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 56 states have internal predecessors, (69), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:32:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2021-11-13 02:32:13,630 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 45 [2021-11-13 02:32:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:13,630 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2021-11-13 02:32:13,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 02:32:13,631 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2021-11-13 02:32:13,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 02:32:13,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:13,633 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:13,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:13,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:13,853 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:13,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:13,854 INFO L85 PathProgramCache]: Analyzing trace with hash -561167172, now seen corresponding path program 1 times [2021-11-13 02:32:13,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:13,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041253571] [2021-11-13 02:32:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:13,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:13,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:13,865 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:13,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:32:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:14,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:32:14,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:14,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:15,833 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:15,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041253571] [2021-11-13 02:32:15,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041253571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:15,834 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:15,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 9] imperfect sequences [] total 13 [2021-11-13 02:32:15,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342270748] [2021-11-13 02:32:15,834 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:15,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:32:15,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:15,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:32:15,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:32:15,837 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 02:32:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:16,367 INFO L93 Difference]: Finished difference Result 123 states and 153 transitions. [2021-11-13 02:32:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:32:16,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2021-11-13 02:32:16,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:16,370 INFO L225 Difference]: With dead ends: 123 [2021-11-13 02:32:16,370 INFO L226 Difference]: Without dead ends: 80 [2021-11-13 02:32:16,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:32:16,373 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 32 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 320.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.78ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 367.43ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:16,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 324 Invalid, 115 Unknown, 0 Unchecked, 3.78ms Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 9 Unchecked, 367.43ms Time] [2021-11-13 02:32:16,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-13 02:32:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2021-11-13 02:32:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 58 states have internal predecessors, (71), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:32:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2021-11-13 02:32:16,386 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 45 [2021-11-13 02:32:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:16,386 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2021-11-13 02:32:16,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 02:32:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2021-11-13 02:32:16,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 02:32:16,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:16,389 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:16,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:16,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:16,609 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:16,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2145452222, now seen corresponding path program 1 times [2021-11-13 02:32:16,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:16,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365735909] [2021-11-13 02:32:16,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:16,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:16,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:16,613 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:16,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:32:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:16,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:32:16,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:17,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:18,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:18,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365735909] [2021-11-13 02:32:18,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365735909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:18,776 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:18,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 10] imperfect sequences [] total 14 [2021-11-13 02:32:18,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545399070] [2021-11-13 02:32:18,776 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:18,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:32:18,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:18,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:32:18,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:32:18,778 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 02:32:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:19,241 INFO L93 Difference]: Finished difference Result 122 states and 151 transitions. [2021-11-13 02:32:19,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:32:19,242 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2021-11-13 02:32:19,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:19,243 INFO L225 Difference]: With dead ends: 122 [2021-11-13 02:32:19,244 INFO L226 Difference]: Without dead ends: 81 [2021-11-13 02:32:19,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-11-13 02:32:19,256 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 32 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 289.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.66ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 336.08ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:19,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 440 Invalid, 137 Unknown, 0 Unchecked, 3.66ms Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 21 Unchecked, 336.08ms Time] [2021-11-13 02:32:19,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-13 02:32:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-11-13 02:32:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 60 states have internal predecessors, (73), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:32:19,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2021-11-13 02:32:19,266 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 45 [2021-11-13 02:32:19,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:19,266 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2021-11-13 02:32:19,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 02:32:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2021-11-13 02:32:19,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 02:32:19,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:19,268 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:19,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:19,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:19,484 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:19,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:19,485 INFO L85 PathProgramCache]: Analyzing trace with hash 865588544, now seen corresponding path program 1 times [2021-11-13 02:32:19,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:19,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107727060] [2021-11-13 02:32:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:19,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:19,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:19,487 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:19,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:32:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:19,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 02:32:19,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:20,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:21,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:21,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107727060] [2021-11-13 02:32:21,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107727060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:21,444 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:21,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 11] imperfect sequences [] total 15 [2021-11-13 02:32:21,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766612742] [2021-11-13 02:32:21,444 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:21,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 02:32:21,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:21,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 02:32:21,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:32:21,446 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 02:32:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:21,901 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2021-11-13 02:32:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:32:21,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2021-11-13 02:32:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:21,903 INFO L225 Difference]: With dead ends: 121 [2021-11-13 02:32:21,904 INFO L226 Difference]: Without dead ends: 82 [2021-11-13 02:32:21,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:32:21,905 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 17 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 283.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.09ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 342.45ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:21,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 540 Invalid, 134 Unknown, 0 Unchecked, 4.09ms Time], IncrementalHoareTripleChecker [4 Valid, 107 Invalid, 0 Unknown, 23 Unchecked, 342.45ms Time] [2021-11-13 02:32:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-13 02:32:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2021-11-13 02:32:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 62 states have internal predecessors, (75), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:32:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2021-11-13 02:32:21,915 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 45 [2021-11-13 02:32:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:21,915 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2021-11-13 02:32:21,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 02:32:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2021-11-13 02:32:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 02:32:21,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:21,917 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:21,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:22,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:22,138 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:22,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:22,138 INFO L85 PathProgramCache]: Analyzing trace with hash 278782530, now seen corresponding path program 1 times [2021-11-13 02:32:22,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:22,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067313283] [2021-11-13 02:32:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:22,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:22,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:22,141 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:22,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:32:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:22,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:32:22,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:23,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:24,321 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:24,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067313283] [2021-11-13 02:32:24,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067313283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:24,321 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:24,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 12] imperfect sequences [] total 16 [2021-11-13 02:32:24,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379034714] [2021-11-13 02:32:24,321 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:24,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 02:32:24,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:24,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 02:32:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:32:24,323 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 02:32:24,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:24,852 INFO L93 Difference]: Finished difference Result 155 states and 194 transitions. [2021-11-13 02:32:24,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:32:24,853 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2021-11-13 02:32:24,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:24,856 INFO L225 Difference]: With dead ends: 155 [2021-11-13 02:32:24,856 INFO L226 Difference]: Without dead ends: 118 [2021-11-13 02:32:24,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:32:24,858 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 48 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 333.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.86ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 407.50ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:24,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 599 Invalid, 189 Unknown, 0 Unchecked, 7.86ms Time], IncrementalHoareTripleChecker [13 Valid, 147 Invalid, 0 Unknown, 29 Unchecked, 407.50ms Time] [2021-11-13 02:32:24,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-13 02:32:24,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2021-11-13 02:32:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 64 states have internal predecessors, (77), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:32:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2021-11-13 02:32:24,869 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 45 [2021-11-13 02:32:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:24,870 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2021-11-13 02:32:24,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 02:32:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2021-11-13 02:32:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 02:32:24,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:24,872 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:24,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:25,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:25,086 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:25,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:25,086 INFO L85 PathProgramCache]: Analyzing trace with hash 979847108, now seen corresponding path program 1 times [2021-11-13 02:32:25,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:25,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911033481] [2021-11-13 02:32:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:25,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:25,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:25,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:25,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:32:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:25,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:32:25,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 02:32:25,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:26,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:26,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911033481] [2021-11-13 02:32:26,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911033481] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:26,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:26,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-11-13 02:32:26,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376072778] [2021-11-13 02:32:26,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:26,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:32:26,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:26,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:32:26,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:32:26,087 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 02:32:28,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:28,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:28,901 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2021-11-13 02:32:28,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:32:28,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-11-13 02:32:28,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:28,904 INFO L225 Difference]: With dead ends: 140 [2021-11-13 02:32:28,904 INFO L226 Difference]: Without dead ends: 105 [2021-11-13 02:32:28,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:32:28,905 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 126 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2693.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.17ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2747.32ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:28,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 363 Invalid, 56 Unknown, 0 Unchecked, 2.17ms Time], IncrementalHoareTripleChecker [14 Valid, 41 Invalid, 1 Unknown, 0 Unchecked, 2747.32ms Time] [2021-11-13 02:32:28,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-13 02:32:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2021-11-13 02:32:28,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 78 states have internal predecessors, (96), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:32:28,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2021-11-13 02:32:28,915 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 45 [2021-11-13 02:32:28,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:28,915 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2021-11-13 02:32:28,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 02:32:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2021-11-13 02:32:28,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 02:32:28,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:28,917 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:28,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:29,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:29,133 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:29,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:29,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1659905478, now seen corresponding path program 1 times [2021-11-13 02:32:29,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:29,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494940269] [2021-11-13 02:32:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:29,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:29,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:29,135 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:29,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:32:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:29,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:32:29,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:29,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:32:29,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:29,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494940269] [2021-11-13 02:32:29,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494940269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:29,976 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:29,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 02:32:29,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619287845] [2021-11-13 02:32:29,976 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:29,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:32:29,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:29,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:32:29,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:32:29,978 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:32:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:30,203 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2021-11-13 02:32:30,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:32:30,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-13 02:32:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:30,206 INFO L225 Difference]: With dead ends: 99 [2021-11-13 02:32:30,206 INFO L226 Difference]: Without dead ends: 97 [2021-11-13 02:32:30,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:32:30,207 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 33 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.66ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:30,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 439 Invalid, 63 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 153.66ms Time] [2021-11-13 02:32:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-13 02:32:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-13 02:32:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 80 states have (on average 1.2375) internal successors, (99), 81 states have internal predecessors, (99), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 02:32:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2021-11-13 02:32:30,249 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 45 [2021-11-13 02:32:30,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:30,250 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2021-11-13 02:32:30,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:32:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2021-11-13 02:32:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 02:32:30,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:30,252 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:32:30,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:30,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:30,471 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:30,471 INFO L85 PathProgramCache]: Analyzing trace with hash 990784662, now seen corresponding path program 1 times [2021-11-13 02:32:30,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:30,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797535039] [2021-11-13 02:32:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:30,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:30,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:30,473 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:30,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:32:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:30,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:32:30,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 02:32:30,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:32:31,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:31,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797535039] [2021-11-13 02:32:31,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797535039] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:31,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:31,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2021-11-13 02:32:31,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973486563] [2021-11-13 02:32:31,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:31,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:32:31,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:31,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:32:31,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:32:31,250 INFO L87 Difference]: Start difference. First operand 97 states and 121 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-13 02:32:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:31,363 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2021-11-13 02:32:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:32:31,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 62 [2021-11-13 02:32:31,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:31,371 INFO L225 Difference]: With dead ends: 131 [2021-11-13 02:32:31,371 INFO L226 Difference]: Without dead ends: 103 [2021-11-13 02:32:31,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:32:31,372 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 56 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.50ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:31,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 303 Invalid, 32 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 91.50ms Time] [2021-11-13 02:32:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-13 02:32:31,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-11-13 02:32:31,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 83 states have (on average 1.2289156626506024) internal successors, (102), 84 states have internal predecessors, (102), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 02:32:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 126 transitions. [2021-11-13 02:32:31,394 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 126 transitions. Word has length 62 [2021-11-13 02:32:31,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:31,394 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 126 transitions. [2021-11-13 02:32:31,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-13 02:32:31,395 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 126 transitions. [2021-11-13 02:32:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 02:32:31,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:31,396 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:32:31,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:31,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:31,611 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:31,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:31,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1705601977, now seen corresponding path program 1 times [2021-11-13 02:32:31,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:31,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952975509] [2021-11-13 02:32:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:31,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:31,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:31,624 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:31,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:32:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:31,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:32:31,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:32:31,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:32:32,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:32,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952975509] [2021-11-13 02:32:32,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952975509] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:32,121 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:32,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 02:32:32,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319764989] [2021-11-13 02:32:32,121 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:32,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:32:32,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:32,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:32:32,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:32,123 INFO L87 Difference]: Start difference. First operand 101 states and 126 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 02:32:32,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:32,237 INFO L93 Difference]: Finished difference Result 182 states and 228 transitions. [2021-11-13 02:32:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:32:32,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 63 [2021-11-13 02:32:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:32,241 INFO L225 Difference]: With dead ends: 182 [2021-11-13 02:32:32,241 INFO L226 Difference]: Without dead ends: 115 [2021-11-13 02:32:32,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:32,243 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.11ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.66ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:32,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 133 Invalid, 45 Unknown, 0 Unchecked, 1.11ms Time], IncrementalHoareTripleChecker [16 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 104.66ms Time] [2021-11-13 02:32:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-13 02:32:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2021-11-13 02:32:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 96 states have internal predecessors, (109), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 02:32:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 133 transitions. [2021-11-13 02:32:32,255 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 133 transitions. Word has length 63 [2021-11-13 02:32:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:32,255 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 133 transitions. [2021-11-13 02:32:32,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 02:32:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 133 transitions. [2021-11-13 02:32:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 02:32:32,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:32,257 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:32:32,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:32,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:32,477 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:32,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:32,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1560006021, now seen corresponding path program 1 times [2021-11-13 02:32:32,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:32,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441268] [2021-11-13 02:32:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:32,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:32,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:32,480 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:32,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:32:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:32,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:32:32,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:32:33,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:32:33,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:33,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441268] [2021-11-13 02:32:33,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441268] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:33,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:33,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-11-13 02:32:33,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192775695] [2021-11-13 02:32:33,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:33,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:32:33,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:33,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:32:33,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:32:33,670 INFO L87 Difference]: Start difference. First operand 113 states and 133 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 02:32:35,707 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:35,967 INFO L93 Difference]: Finished difference Result 164 states and 194 transitions. [2021-11-13 02:32:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:32:35,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2021-11-13 02:32:35,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:35,970 INFO L225 Difference]: With dead ends: 164 [2021-11-13 02:32:35,970 INFO L226 Difference]: Without dead ends: 128 [2021-11-13 02:32:35,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:32:35,972 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 11 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2246.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.29ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2286.15ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:35,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 259 Invalid, 21 Unknown, 0 Unchecked, 1.29ms Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 2286.15ms Time] [2021-11-13 02:32:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-13 02:32:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2021-11-13 02:32:35,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 98 states have internal predecessors, (111), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 02:32:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2021-11-13 02:32:35,983 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 63 [2021-11-13 02:32:35,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:35,984 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2021-11-13 02:32:35,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 02:32:35,984 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2021-11-13 02:32:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 02:32:35,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:35,986 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:32:36,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-13 02:32:36,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:36,205 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1497966407, now seen corresponding path program 1 times [2021-11-13 02:32:36,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:36,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209065545] [2021-11-13 02:32:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:36,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:36,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:36,207 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:36,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 02:32:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:36,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:32:36,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:32:36,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:32:37,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:37,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209065545] [2021-11-13 02:32:37,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209065545] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:37,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:37,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 14 [2021-11-13 02:32:37,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196101759] [2021-11-13 02:32:37,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:37,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:32:37,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:37,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:32:37,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:32:37,251 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 02:32:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:37,773 INFO L93 Difference]: Finished difference Result 220 states and 261 transitions. [2021-11-13 02:32:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:32:37,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2021-11-13 02:32:37,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:37,776 INFO L225 Difference]: With dead ends: 220 [2021-11-13 02:32:37,776 INFO L226 Difference]: Without dead ends: 165 [2021-11-13 02:32:37,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-13 02:32:37,777 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 121 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 348.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.24ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 402.11ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:37,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 368 Invalid, 152 Unknown, 0 Unchecked, 3.24ms Time], IncrementalHoareTripleChecker [36 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 402.11ms Time] [2021-11-13 02:32:37,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-13 02:32:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 121. [2021-11-13 02:32:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 103 states have internal predecessors, (117), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-13 02:32:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2021-11-13 02:32:37,789 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 63 [2021-11-13 02:32:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:37,790 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2021-11-13 02:32:37,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 02:32:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2021-11-13 02:32:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 02:32:37,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:37,792 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:32:37,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:38,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:38,012 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:38,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:38,013 INFO L85 PathProgramCache]: Analyzing trace with hash 395834293, now seen corresponding path program 1 times [2021-11-13 02:32:38,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:38,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397442338] [2021-11-13 02:32:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:38,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:38,014 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:38,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:32:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:38,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:32:38,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:32:38,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:32:39,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:39,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397442338] [2021-11-13 02:32:39,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397442338] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:39,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:39,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2021-11-13 02:32:39,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129777002] [2021-11-13 02:32:39,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:39,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:32:39,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:39,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:32:39,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-11-13 02:32:39,414 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 02:32:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:40,083 INFO L93 Difference]: Finished difference Result 221 states and 262 transitions. [2021-11-13 02:32:40,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:32:40,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2021-11-13 02:32:40,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:40,085 INFO L225 Difference]: With dead ends: 221 [2021-11-13 02:32:40,085 INFO L226 Difference]: Without dead ends: 150 [2021-11-13 02:32:40,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:32:40,086 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 145 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 353.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.78ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 417.60ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:40,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 367 Invalid, 174 Unknown, 0 Unchecked, 2.78ms Time], IncrementalHoareTripleChecker [51 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 417.60ms Time] [2021-11-13 02:32:40,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-13 02:32:40,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 115. [2021-11-13 02:32:40,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 97 states have internal predecessors, (110), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-13 02:32:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 136 transitions. [2021-11-13 02:32:40,097 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 136 transitions. Word has length 63 [2021-11-13 02:32:40,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:40,097 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 136 transitions. [2021-11-13 02:32:40,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 02:32:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 136 transitions. [2021-11-13 02:32:40,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 02:32:40,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:40,099 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:32:40,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-13 02:32:40,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:40,306 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:40,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:40,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1467507, now seen corresponding path program 1 times [2021-11-13 02:32:40,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:40,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160978229] [2021-11-13 02:32:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:40,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:40,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:40,308 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:40,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 02:32:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:40,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 02:32:40,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:32:41,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:32:42,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:42,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160978229] [2021-11-13 02:32:42,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160978229] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:42,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:42,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-11-13 02:32:42,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202548] [2021-11-13 02:32:42,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:42,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:32:42,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:42,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:32:42,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:32:42,100 INFO L87 Difference]: Start difference. First operand 115 states and 136 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 02:32:42,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:42,760 INFO L93 Difference]: Finished difference Result 197 states and 234 transitions. [2021-11-13 02:32:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:32:42,760 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2021-11-13 02:32:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:42,762 INFO L225 Difference]: With dead ends: 197 [2021-11-13 02:32:42,762 INFO L226 Difference]: Without dead ends: 148 [2021-11-13 02:32:42,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:32:42,763 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 135 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 319.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.49ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 375.04ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:42,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 368 Invalid, 169 Unknown, 0 Unchecked, 2.49ms Time], IncrementalHoareTripleChecker [46 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 375.04ms Time] [2021-11-13 02:32:42,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-13 02:32:42,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 117. [2021-11-13 02:32:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 99 states have internal predecessors, (112), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-13 02:32:42,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2021-11-13 02:32:42,778 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 63 [2021-11-13 02:32:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:42,778 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2021-11-13 02:32:42,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 02:32:42,779 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2021-11-13 02:32:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 02:32:42,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:42,780 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:32:42,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:42,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:42,994 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2052451505, now seen corresponding path program 1 times [2021-11-13 02:32:42,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:42,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350511275] [2021-11-13 02:32:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:42,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:42,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:42,995 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:42,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 02:32:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:43,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 02:32:43,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:32:43,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:32:44,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:44,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350511275] [2021-11-13 02:32:44,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350511275] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:44,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:44,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2021-11-13 02:32:44,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474732599] [2021-11-13 02:32:44,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:44,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:32:44,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:44,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:32:44,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:32:44,219 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 02:32:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:44,794 INFO L93 Difference]: Finished difference Result 193 states and 229 transitions. [2021-11-13 02:32:44,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:32:44,795 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2021-11-13 02:32:44,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:44,797 INFO L225 Difference]: With dead ends: 193 [2021-11-13 02:32:44,797 INFO L226 Difference]: Without dead ends: 146 [2021-11-13 02:32:44,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:32:44,798 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 153 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 340.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.69ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 386.29ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:44,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 381 Invalid, 189 Unknown, 0 Unchecked, 2.69ms Time], IncrementalHoareTripleChecker [64 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 386.29ms Time] [2021-11-13 02:32:44,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-13 02:32:44,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2021-11-13 02:32:44,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 100 states have (on average 1.14) internal successors, (114), 101 states have internal predecessors, (114), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-13 02:32:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2021-11-13 02:32:44,814 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 63 [2021-11-13 02:32:44,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:44,815 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2021-11-13 02:32:44,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 02:32:44,815 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2021-11-13 02:32:44,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 02:32:44,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:44,817 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:32:44,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-13 02:32:45,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:45,030 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:45,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:45,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1967756177, now seen corresponding path program 1 times [2021-11-13 02:32:45,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:45,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353513875] [2021-11-13 02:32:45,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:45,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:45,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:45,031 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:45,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 02:32:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:45,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 02:32:45,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:32:45,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:32:46,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:46,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353513875] [2021-11-13 02:32:46,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353513875] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:46,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:46,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2021-11-13 02:32:46,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070198028] [2021-11-13 02:32:46,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:46,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:32:46,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:46,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:32:46,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:32:46,246 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 02:32:46,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:46,750 INFO L93 Difference]: Finished difference Result 189 states and 224 transitions. [2021-11-13 02:32:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:32:46,751 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2021-11-13 02:32:46,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:46,753 INFO L225 Difference]: With dead ends: 189 [2021-11-13 02:32:46,753 INFO L226 Difference]: Without dead ends: 144 [2021-11-13 02:32:46,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:32:46,754 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 115 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 287.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.54ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 333.09ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:46,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 404 Invalid, 170 Unknown, 0 Unchecked, 2.54ms Time], IncrementalHoareTripleChecker [48 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 333.09ms Time] [2021-11-13 02:32:46,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-13 02:32:46,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2021-11-13 02:32:46,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-13 02:32:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2021-11-13 02:32:46,768 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 142 transitions. Word has length 63 [2021-11-13 02:32:46,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:46,769 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 142 transitions. [2021-11-13 02:32:46,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 02:32:46,769 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 142 transitions. [2021-11-13 02:32:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 02:32:46,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:46,770 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:32:46,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:46,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:46,974 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:46,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1945123923, now seen corresponding path program 1 times [2021-11-13 02:32:46,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:46,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260600625] [2021-11-13 02:32:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:46,975 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:46,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:46,976 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:46,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 02:32:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:47,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 02:32:47,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:32:47,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:32:48,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:48,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260600625] [2021-11-13 02:32:48,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260600625] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:48,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:48,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2021-11-13 02:32:48,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148408334] [2021-11-13 02:32:48,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:48,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:32:48,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:48,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:32:48,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:32:48,430 INFO L87 Difference]: Start difference. First operand 121 states and 142 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 02:32:48,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:48,935 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2021-11-13 02:32:48,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:32:48,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2021-11-13 02:32:48,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:48,937 INFO L225 Difference]: With dead ends: 186 [2021-11-13 02:32:48,938 INFO L226 Difference]: Without dead ends: 143 [2021-11-13 02:32:48,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:32:48,939 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 151 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 272.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.09ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 341.48ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:48,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 358 Invalid, 178 Unknown, 0 Unchecked, 2.09ms Time], IncrementalHoareTripleChecker [71 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 341.48ms Time] [2021-11-13 02:32:48,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-13 02:32:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 123. [2021-11-13 02:32:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 105 states have internal predecessors, (118), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-13 02:32:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2021-11-13 02:32:48,952 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 63 [2021-11-13 02:32:48,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:48,953 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2021-11-13 02:32:48,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 02:32:48,953 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2021-11-13 02:32:48,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 02:32:48,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:48,954 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:32:48,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:49,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:49,170 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:49,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:49,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1840370283, now seen corresponding path program 1 times [2021-11-13 02:32:49,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:49,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483572258] [2021-11-13 02:32:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:49,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:49,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:49,172 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:49,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 02:32:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:49,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 02:32:49,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 02:32:49,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:32:49,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:49,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483572258] [2021-11-13 02:32:49,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483572258] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:49,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:49,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-13 02:32:49,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298778529] [2021-11-13 02:32:49,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:49,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:32:49,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:49,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:32:49,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:32:49,913 INFO L87 Difference]: Start difference. First operand 123 states and 144 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:32:52,819 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:55,786 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2021-11-13 02:32:55,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:32:55,787 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2021-11-13 02:32:55,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:55,788 INFO L225 Difference]: With dead ends: 192 [2021-11-13 02:32:55,788 INFO L226 Difference]: Without dead ends: 156 [2021-11-13 02:32:55,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:32:55,789 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 77 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5683.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5778.54ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:55,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 571 Invalid, 92 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [20 Valid, 71 Invalid, 1 Unknown, 0 Unchecked, 5778.54ms Time] [2021-11-13 02:32:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-13 02:32:55,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 125. [2021-11-13 02:32:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 107 states have internal predecessors, (121), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-13 02:32:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2021-11-13 02:32:55,806 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 63 [2021-11-13 02:32:55,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:55,807 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2021-11-13 02:32:55,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:32:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2021-11-13 02:32:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 02:32:55,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:55,809 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:32:55,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:56,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:56,014 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:56,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1435540623, now seen corresponding path program 1 times [2021-11-13 02:32:56,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:56,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780401118] [2021-11-13 02:32:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:56,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:56,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:56,016 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:56,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 02:32:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:56,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:32:56,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:32:56,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 02:32:57,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:57,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780401118] [2021-11-13 02:32:57,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780401118] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:57,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:57,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-13 02:32:57,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739938937] [2021-11-13 02:32:57,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:57,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:32:57,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:57,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:32:57,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:32:57,352 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 02:32:59,583 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:00,619 INFO L93 Difference]: Finished difference Result 169 states and 195 transitions. [2021-11-13 02:33:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:33:00,620 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 65 [2021-11-13 02:33:00,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:00,621 INFO L225 Difference]: With dead ends: 169 [2021-11-13 02:33:00,621 INFO L226 Difference]: Without dead ends: 108 [2021-11-13 02:33:00,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-13 02:33:00,623 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 118 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3123.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.44ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3174.45ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:00,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 314 Invalid, 56 Unknown, 0 Unchecked, 1.44ms Time], IncrementalHoareTripleChecker [11 Valid, 44 Invalid, 1 Unknown, 0 Unchecked, 3174.45ms Time] [2021-11-13 02:33:00,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-13 02:33:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-11-13 02:33:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 89 states have internal predecessors, (101), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 02:33:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-11-13 02:33:00,639 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 65 [2021-11-13 02:33:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:00,640 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-11-13 02:33:00,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 02:33:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-11-13 02:33:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 02:33:00,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:00,642 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:33:00,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:00,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:00,858 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:00,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:00,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1286455351, now seen corresponding path program 1 times [2021-11-13 02:33:00,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:00,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507346141] [2021-11-13 02:33:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:00,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:00,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:00,860 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:00,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 02:33:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:01,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 02:33:01,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:33:01,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:02,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:02,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507346141] [2021-11-13 02:33:02,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507346141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:02,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1521560274] [2021-11-13 02:33:02,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:02,150 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:33:02,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:33:02,152 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:33:02,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-13 02:33:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:02,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:33:02,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:33:02,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:03,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1521560274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:03,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635921878] [2021-11-13 02:33:03,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:03,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:03,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:03,072 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:33:03,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 02:33:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:03,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:33:03,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:33:03,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:03,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635921878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:03,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:33:03,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8, 8, 8, 8] total 19 [2021-11-13 02:33:03,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340355510] [2021-11-13 02:33:03,680 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:33:03,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 02:33:03,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:03,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 02:33:03,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:33:03,682 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-13 02:33:05,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:05,345 INFO L93 Difference]: Finished difference Result 262 states and 319 transitions. [2021-11-13 02:33:05,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 02:33:05,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 65 [2021-11-13 02:33:05,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:05,348 INFO L225 Difference]: With dead ends: 262 [2021-11-13 02:33:05,348 INFO L226 Difference]: Without dead ends: 207 [2021-11-13 02:33:05,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2021-11-13 02:33:05,350 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 289 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 829.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.48ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 941.91ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:05,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 968 Invalid, 466 Unknown, 0 Unchecked, 5.48ms Time], IncrementalHoareTripleChecker [70 Valid, 357 Invalid, 0 Unknown, 39 Unchecked, 941.91ms Time] [2021-11-13 02:33:05,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-13 02:33:05,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 117. [2021-11-13 02:33:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 98 states have (on average 1.163265306122449) internal successors, (114), 99 states have internal predecessors, (114), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-13 02:33:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2021-11-13 02:33:05,370 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 65 [2021-11-13 02:33:05,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:05,371 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2021-11-13 02:33:05,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-13 02:33:05,371 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2021-11-13 02:33:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 02:33:05,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:05,373 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:33:05,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-13 02:33:05,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-13 02:33:05,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-13 02:33:05,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:05,977 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:05,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:05,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1114711245, now seen corresponding path program 1 times [2021-11-13 02:33:05,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:05,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756890245] [2021-11-13 02:33:05,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:05,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:05,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:05,980 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:05,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 02:33:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:06,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 02:33:06,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:33:07,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:08,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:08,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756890245] [2021-11-13 02:33:08,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756890245] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:08,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1563209188] [2021-11-13 02:33:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:08,277 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:33:08,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:33:08,279 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:33:08,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-13 02:33:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:08,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:33:08,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:33:09,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:10,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1563209188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:10,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99369447] [2021-11-13 02:33:10,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:10,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:10,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:10,065 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:33:10,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-13 02:33:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:10,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:33:10,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:33:10,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:10,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99369447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:10,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:33:10,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10, 10, 10, 10] total 29 [2021-11-13 02:33:10,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124812727] [2021-11-13 02:33:10,712 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:33:10,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-13 02:33:10,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:10,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-13 02:33:10,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-11-13 02:33:10,714 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-13 02:33:12,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:12,881 INFO L93 Difference]: Finished difference Result 184 states and 216 transitions. [2021-11-13 02:33:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 02:33:12,886 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 65 [2021-11-13 02:33:12,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:12,888 INFO L225 Difference]: With dead ends: 184 [2021-11-13 02:33:12,888 INFO L226 Difference]: Without dead ends: 131 [2021-11-13 02:33:12,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 356 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=310, Invalid=1250, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 02:33:12,890 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 141 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 965.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.61ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 1095.65ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:12,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 830 Invalid, 470 Unknown, 0 Unchecked, 4.61ms Time], IncrementalHoareTripleChecker [53 Valid, 364 Invalid, 0 Unknown, 53 Unchecked, 1095.65ms Time] [2021-11-13 02:33:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-13 02:33:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2021-11-13 02:33:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 109 states have internal predecessors, (125), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-13 02:33:12,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 153 transitions. [2021-11-13 02:33:12,922 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 153 transitions. Word has length 65 [2021-11-13 02:33:12,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:12,923 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 153 transitions. [2021-11-13 02:33:12,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-13 02:33:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 153 transitions. [2021-11-13 02:33:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 02:33:12,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:12,927 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:33:12,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:13,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:13,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:13,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:33:13,550 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:13,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:13,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1509078031, now seen corresponding path program 1 times [2021-11-13 02:33:13,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:13,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104868013] [2021-11-13 02:33:13,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:13,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:13,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:13,552 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:13,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 02:33:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:13,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 02:33:13,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:33:14,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:16,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:16,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104868013] [2021-11-13 02:33:16,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104868013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:16,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1629395940] [2021-11-13 02:33:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:16,011 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:33:16,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:33:16,022 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:33:16,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-13 02:33:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:16,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:33:16,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:33:17,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:18,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1629395940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:18,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133499920] [2021-11-13 02:33:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:18,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:18,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:18,317 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:33:18,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-13 02:33:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:18,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:33:18,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:33:19,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:19,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133499920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:19,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:33:19,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10, 10, 10, 10] total 37 [2021-11-13 02:33:19,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007551871] [2021-11-13 02:33:19,457 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:33:19,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 02:33:19,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:19,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 02:33:19,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 02:33:19,460 INFO L87 Difference]: Start difference. First operand 128 states and 153 transitions. Second operand has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 11 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2021-11-13 02:33:22,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:22,725 INFO L93 Difference]: Finished difference Result 262 states and 317 transitions. [2021-11-13 02:33:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 02:33:22,726 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 11 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) Word has length 65 [2021-11-13 02:33:22,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:22,729 INFO L225 Difference]: With dead ends: 262 [2021-11-13 02:33:22,730 INFO L226 Difference]: Without dead ends: 213 [2021-11-13 02:33:22,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 347 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=484, Invalid=2168, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 02:33:22,732 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 266 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1442.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.88ms SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 1607.29ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:22,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 1549 Invalid, 840 Unknown, 0 Unchecked, 6.88ms Time], IncrementalHoareTripleChecker [79 Valid, 614 Invalid, 0 Unknown, 147 Unchecked, 1607.29ms Time] [2021-11-13 02:33:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-13 02:33:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 130. [2021-11-13 02:33:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 111 states have internal predecessors, (127), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-13 02:33:22,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 155 transitions. [2021-11-13 02:33:22,754 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 155 transitions. Word has length 65 [2021-11-13 02:33:22,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:22,754 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 155 transitions. [2021-11-13 02:33:22,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 11 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2021-11-13 02:33:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 155 transitions. [2021-11-13 02:33:22,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 02:33:22,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:22,757 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:33:22,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:22,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:23,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:23,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:23,362 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:23,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:23,362 INFO L85 PathProgramCache]: Analyzing trace with hash 541905967, now seen corresponding path program 1 times [2021-11-13 02:33:23,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:23,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492363543] [2021-11-13 02:33:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:23,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:23,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:23,364 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:23,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 02:33:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:23,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:33:23,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:33:24,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:24,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:24,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492363543] [2021-11-13 02:33:24,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492363543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:24,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1435403462] [2021-11-13 02:33:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:24,978 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:33:24,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:33:24,979 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:33:24,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-13 02:33:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:25,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:33:25,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:33:25,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:25,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1435403462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:25,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486670406] [2021-11-13 02:33:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:25,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:25,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:25,967 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:33:25,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-13 02:33:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:26,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:33:26,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:33:26,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:26,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486670406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:26,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:33:26,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10, 10, 10, 10] total 23 [2021-11-13 02:33:26,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171370946] [2021-11-13 02:33:26,581 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:33:26,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 02:33:26,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:26,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 02:33:26,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-13 02:33:26,583 INFO L87 Difference]: Start difference. First operand 130 states and 155 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-13 02:33:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:28,213 INFO L93 Difference]: Finished difference Result 257 states and 308 transitions. [2021-11-13 02:33:28,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 02:33:28,215 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 65 [2021-11-13 02:33:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:28,217 INFO L225 Difference]: With dead ends: 257 [2021-11-13 02:33:28,217 INFO L226 Difference]: Without dead ends: 210 [2021-11-13 02:33:28,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 02:33:28,219 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 300 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 854.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.60ms SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 967.38ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:28,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 1085 Invalid, 595 Unknown, 0 Unchecked, 4.60ms Time], IncrementalHoareTripleChecker [113 Valid, 401 Invalid, 0 Unknown, 81 Unchecked, 967.38ms Time] [2021-11-13 02:33:28,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-13 02:33:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 143. [2021-11-13 02:33:28,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 122 states have (on average 1.139344262295082) internal successors, (139), 123 states have internal predecessors, (139), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-13 02:33:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 169 transitions. [2021-11-13 02:33:28,243 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 169 transitions. Word has length 65 [2021-11-13 02:33:28,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:28,243 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 169 transitions. [2021-11-13 02:33:28,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-13 02:33:28,244 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 169 transitions. [2021-11-13 02:33:28,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 02:33:28,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:28,246 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:33:28,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:28,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-13 02:33:28,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-13 02:33:28,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:33:28,874 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:28,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:28,874 INFO L85 PathProgramCache]: Analyzing trace with hash 816665581, now seen corresponding path program 1 times [2021-11-13 02:33:28,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:28,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761368995] [2021-11-13 02:33:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:28,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:28,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:28,876 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:28,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-13 02:33:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:29,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:33:29,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:33:29,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:30,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:30,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761368995] [2021-11-13 02:33:30,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761368995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:30,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1968708642] [2021-11-13 02:33:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:30,676 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:33:30,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:33:30,677 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:33:30,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-13 02:33:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:31,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:33:31,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:33:32,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:32,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1968708642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:32,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216615421] [2021-11-13 02:33:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:32,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:32,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:32,499 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:33:32,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-13 02:33:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:32,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:33:32,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:33:33,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:33:33,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216615421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:33,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:33:33,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10, 10, 10, 10] total 30 [2021-11-13 02:33:33,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924119848] [2021-11-13 02:33:33,342 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:33:33,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-13 02:33:33,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:33,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-13 02:33:33,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-11-13 02:33:33,345 INFO L87 Difference]: Start difference. First operand 143 states and 169 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-13 02:33:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:34,601 INFO L93 Difference]: Finished difference Result 229 states and 269 transitions. [2021-11-13 02:33:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 02:33:34,602 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 65 [2021-11-13 02:33:34,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:34,604 INFO L225 Difference]: With dead ends: 229 [2021-11-13 02:33:34,605 INFO L226 Difference]: Without dead ends: 184 [2021-11-13 02:33:34,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 02:33:34,607 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 161 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 575.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.26ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 664.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:34,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 1050 Invalid, 463 Unknown, 0 Unchecked, 3.26ms Time], IncrementalHoareTripleChecker [48 Valid, 271 Invalid, 0 Unknown, 144 Unchecked, 664.00ms Time] [2021-11-13 02:33:34,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-13 02:33:34,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 151. [2021-11-13 02:33:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 131 states have internal predecessors, (147), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-13 02:33:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 177 transitions. [2021-11-13 02:33:34,629 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 177 transitions. Word has length 65 [2021-11-13 02:33:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:34,630 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 177 transitions. [2021-11-13 02:33:34,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-13 02:33:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 177 transitions. [2021-11-13 02:33:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 02:33:34,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:34,632 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 02:33:34,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-13 02:33:34,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:35,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:35,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:33:35,248 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:35,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:35,249 INFO L85 PathProgramCache]: Analyzing trace with hash 839297835, now seen corresponding path program 1 times [2021-11-13 02:33:35,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:35,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119001235] [2021-11-13 02:33:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:35,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:35,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:35,252 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:35,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f072c97b-fe5c-4d38-b937-e70b61bdc195/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-13 02:33:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:35,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-13 02:33:35,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:35,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-13 02:33:36,010 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-13 02:33:38,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-13 02:33:40,965 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_2| (_ BitVec 64)) (|ULTIMATE.start_memset_using_uint64_impl_~c#1| (_ BitVec 32)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_2| (_ BitVec 64))) (let ((.cse0 ((_ extract 7 0) |ULTIMATE.start_memset_using_uint64_impl_~c#1|))) (and (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_2| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_2|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_2|) (_ bv0 64)) .cse0) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_2|) (_ bv0 64)) .cse0)))) is different from true [2021-11-13 02:33:43,556 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_3| (_ BitVec 64)) (|ULTIMATE.start_memset_using_uint64_impl_~c#1| (_ BitVec 32)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_3| (_ BitVec 64))) (let ((.cse0 ((_ extract 7 0) |ULTIMATE.start_memset_using_uint64_impl_~c#1|))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_3|) (_ bv0 64)) .cse0) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_3| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_3|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_3|) (_ bv0 64)) .cse0)))) is different from true [2021-11-13 02:33:46,138 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_4| (_ BitVec 64)) (|ULTIMATE.start_memset_using_uint64_impl_~c#1| (_ BitVec 32)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_4| (_ BitVec 64))) (let ((.cse0 ((_ extract 7 0) |ULTIMATE.start_memset_using_uint64_impl_~c#1|))) (and (= .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_4|) (_ bv0 64))) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_4| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_4|)) (= .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_4|) (_ bv0 64)))))) is different from true [2021-11-13 02:33:55,081 INFO L354 Elim1Store]: treesize reduction 50, result has 12.3 percent of original size [2021-11-13 02:33:55,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 34 [2021-11-13 02:33:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2021-11-13 02:33:55,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:04,878 INFO L354 Elim1Store]: treesize reduction 22, result has 62.1 percent of original size [2021-11-13 02:34:04,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 401 treesize of output 336 [2021-11-13 02:34:05,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:05,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 336 treesize of output 340 [2021-11-13 02:34:05,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 4 [2021-11-13 02:34:05,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:05,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 34 [2021-11-13 02:34:05,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 5 [2021-11-13 02:34:06,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:34:06,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 434 treesize of output 426