./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_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_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/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_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/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_f645c6ec-17cc-4e62-8a55-71a1392edfef/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 d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:31:40,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:31:40,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:31:40,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:31:40,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:31:40,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:31:40,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:31:40,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:31:40,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:31:40,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:31:40,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:31:40,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:31:40,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:31:40,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:31:40,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:31:40,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:31:40,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:31:40,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:31:40,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:31:40,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:31:40,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:31:40,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:31:40,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:31:40,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:31:40,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:31:40,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:31:40,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:31:40,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:31:40,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:31:40,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:31:40,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:31:40,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:31:40,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:31:40,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:31:40,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:31:40,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:31:40,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:31:40,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:31:40,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:31:40,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:31:40,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:31:40,435 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 02:31:40,466 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:31:40,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:31:40,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:31:40,468 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:31:40,468 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:31:40,468 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:31:40,468 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:31:40,469 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:31:40,469 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:31:40,469 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:31:40,470 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:31:40,470 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:31:40,470 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:31:40,471 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:31:40,471 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:31:40,471 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:31:40,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:31:40,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:31:40,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:31:40,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:31:40,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:31:40,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:31:40,474 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:31:40,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:31:40,474 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:31:40,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:31:40,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:31:40,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:31:40,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:31:40,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:31:40,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:31:40,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:31:40,477 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:31:40,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:31:40,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:31:40,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:31:40,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:31:40,478 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_f645c6ec-17cc-4e62-8a55-71a1392edfef/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 [2021-11-13 02:31:40,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:31:40,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:31:40,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:31:40,842 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:31:40,843 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:31:40,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-11-13 02:31:40,913 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/data/48bd5876c/5c45d8d2baa74adf9a70f2f742d9d98b/FLAG019e7de97 [2021-11-13 02:31:41,829 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:31:41,830 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-11-13 02:31:41,887 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/data/48bd5876c/5c45d8d2baa74adf9a70f2f742d9d98b/FLAG019e7de97 [2021-11-13 02:31:42,314 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/data/48bd5876c/5c45d8d2baa74adf9a70f2f742d9d98b [2021-11-13 02:31:42,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:31:42,331 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:31:42,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:31:42,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:31:42,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:31:42,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:31:42" (1/1) ... [2021-11-13 02:31:42,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@394e67a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:42, skipping insertion in model container [2021-11-13 02:31:42,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:31:42" (1/1) ... [2021-11-13 02:31:42,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:31:42,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:31:42,905 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_f645c6ec-17cc-4e62-8a55-71a1392edfef/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2021-11-13 02:31:42,912 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_f645c6ec-17cc-4e62-8a55-71a1392edfef/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2021-11-13 02:31:42,936 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:31:42,945 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:31:43,857 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:43,858 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:43,859 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:43,860 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:43,862 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:43,884 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:43,888 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:43,892 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:43,898 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:43,901 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:43,906 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:43,907 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:43,913 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:44,396 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:31:44,398 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:31:44,401 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:31:44,403 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:31:44,410 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:31:44,413 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:31:44,414 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:31:44,416 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:31:44,417 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:31:44,431 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:31:44,613 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:31:44,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:31:44,661 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 02:31:44,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6b7d0422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:44, skipping insertion in model container [2021-11-13 02:31:44,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:31:44,662 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:31:44,664 INFO L158 Benchmark]: Toolchain (without parser) took 2331.88ms. Allocated memory is still 123.7MB. Free memory was 78.4MB in the beginning and 65.3MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-13 02:31:44,665 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 123.7MB. Free memory is still 101.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:31:44,666 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2328.74ms. Allocated memory is still 123.7MB. Free memory was 78.3MB in the beginning and 65.3MB in the end (delta: 13.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-13 02:31:44,668 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 123.7MB. Free memory is still 101.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2328.74ms. Allocated memory is still 123.7MB. Free memory was 78.3MB in the beginning and 65.3MB in the end (delta: 13.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7037]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/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_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/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_f645c6ec-17cc-4e62-8a55-71a1392edfef/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 d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:31:47,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:31:47,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:31:47,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:31:47,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:31:47,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:31:47,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:31:47,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:31:47,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:31:47,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:31:47,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:31:47,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:31:47,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:31:47,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:31:47,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:31:47,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:31:47,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:31:47,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:31:47,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:31:47,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:31:47,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:31:47,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:31:47,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:31:47,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:31:47,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:31:47,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:31:47,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:31:47,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:31:47,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:31:47,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:31:47,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:31:47,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:31:47,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:31:47,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:31:47,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:31:47,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:31:47,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:31:47,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:31:47,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:31:47,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:31:47,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:31:47,684 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 02:31:47,740 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:31:47,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:31:47,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:31:47,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:31:47,742 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:31:47,743 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:31:47,743 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:31:47,743 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:31:47,743 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:31:47,744 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:31:47,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:31:47,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:31:47,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:31:47,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:31:47,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:31:47,748 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:31:47,748 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:31:47,749 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:31:47,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:31:47,749 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:31:47,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:31:47,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:31:47,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:31:47,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:31:47,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:31:47,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:31:47,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:31:47,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:31:47,752 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:31:47,752 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:31:47,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:31:47,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:31:47,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:31:47,753 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_f645c6ec-17cc-4e62-8a55-71a1392edfef/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 [2021-11-13 02:31:48,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:31:48,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:31:48,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:31:48,266 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:31:48,268 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:31:48,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-11-13 02:31:48,350 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/data/e7eb5e7c7/8e89c9f9082c4f75a5fba523a6c2b794/FLAG47ad5f20d [2021-11-13 02:31:49,401 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:31:49,401 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-11-13 02:31:49,461 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/data/e7eb5e7c7/8e89c9f9082c4f75a5fba523a6c2b794/FLAG47ad5f20d [2021-11-13 02:31:49,846 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/data/e7eb5e7c7/8e89c9f9082c4f75a5fba523a6c2b794 [2021-11-13 02:31:49,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:31:49,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:31:49,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:31:49,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:31:49,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:31:49,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:31:49" (1/1) ... [2021-11-13 02:31:49,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c801f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:49, skipping insertion in model container [2021-11-13 02:31:49,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:31:49" (1/1) ... [2021-11-13 02:31:49,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:31:49,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:31:50,358 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_f645c6ec-17cc-4e62-8a55-71a1392edfef/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2021-11-13 02:31:50,365 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_f645c6ec-17cc-4e62-8a55-71a1392edfef/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2021-11-13 02:31:50,385 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:31:50,390 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:31:51,390 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:51,401 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:51,402 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:51,403 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:51,405 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:51,439 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:51,440 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:51,443 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:51,444 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:51,447 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:51,448 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:51,449 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:51,450 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:51,975 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:31:51,977 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:31:51,978 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:31:51,980 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:31:51,982 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:31:51,983 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:31:51,984 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:31:51,985 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:31:51,986 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:31:51,986 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:31:52,175 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:31:52,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:31:52,242 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:31:52,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:31:52,286 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_f645c6ec-17cc-4e62-8a55-71a1392edfef/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2021-11-13 02:31:52,287 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_f645c6ec-17cc-4e62-8a55-71a1392edfef/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2021-11-13 02:31:52,288 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:31:52,289 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:31:52,385 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,385 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,386 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,387 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,387 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,397 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,398 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,400 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,400 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,402 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,403 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,404 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,404 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,458 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:31:52,459 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:31:52,460 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:31:52,462 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:31:52,463 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:31:52,464 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:31:52,464 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:31:52,465 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:31:52,466 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:31:52,466 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:31:52,521 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:31:52,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:31:52,576 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:31:52,592 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_f645c6ec-17cc-4e62-8a55-71a1392edfef/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2021-11-13 02:31:52,593 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_f645c6ec-17cc-4e62-8a55-71a1392edfef/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2021-11-13 02:31:52,595 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:31:52,596 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:31:52,640 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,641 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,641 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,642 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,643 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,699 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,704 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,707 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,708 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,710 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,710 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,711 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,711 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:31:52,773 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:31:52,774 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:31:52,775 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:31:52,776 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:31:52,778 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:31:52,778 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:31:52,780 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:31:52,783 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:31:52,784 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:31:52,784 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:31:52,843 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:31:52,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:31:53,200 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:31:53,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:53 WrapperNode [2021-11-13 02:31:53,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:31:53,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:31:53,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:31:53,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:31:53,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:53" (1/1) ... [2021-11-13 02:31:53,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:53" (1/1) ... [2021-11-13 02:31:53,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:31:53,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:31:53,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:31:53,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:31:53,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:53" (1/1) ... [2021-11-13 02:31:53,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:53" (1/1) ... [2021-11-13 02:31:53,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:53" (1/1) ... [2021-11-13 02:31:53,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:53" (1/1) ... [2021-11-13 02:31:53,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:53" (1/1) ... [2021-11-13 02:31:53,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:53" (1/1) ... [2021-11-13 02:31:53,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:53" (1/1) ... [2021-11-13 02:31:53,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:31:53,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:31:53,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:31:53,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:31:53,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:53" (1/1) ... [2021-11-13 02:31:53,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:31:53,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:31:53,575 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:31:53,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:31:53,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:31:53,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:31:53,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 02:31:53,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 02:31:53,633 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-13 02:31:53,633 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-13 02:31:53,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:31:53,634 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-13 02:31:53,634 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-13 02:31:53,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:31:53,635 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_insert_before [2021-11-13 02:31:53,635 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_insert_before [2021-11-13 02:31:53,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:31:53,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:31:53,635 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 02:31:53,636 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 02:31:53,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:31:53,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:31:53,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 02:31:53,637 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-13 02:31:53,637 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-13 02:31:53,638 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-13 02:31:53,638 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-13 02:31:54,708 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:31:54,708 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 02:31:54,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:31:54 BoogieIcfgContainer [2021-11-13 02:31:54,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:31:54,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:31:54,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:31:54,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:31:54,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:31:49" (1/3) ... [2021-11-13 02:31:54,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7837d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:31:54, skipping insertion in model container [2021-11-13 02:31:54,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:31:53" (2/3) ... [2021-11-13 02:31:54,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7837d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:31:54, skipping insertion in model container [2021-11-13 02:31:54,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:31:54" (3/3) ... [2021-11-13 02:31:54,732 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_push_back_harness.i [2021-11-13 02:31:54,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:31:54,739 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:31:54,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:31:54,834 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 02:31:54,834 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:31:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 66 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-13 02:31:54,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 02:31:54,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:54,887 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:54,887 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:54,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:54,894 INFO L85 PathProgramCache]: Analyzing trace with hash 524704703, now seen corresponding path program 1 times [2021-11-13 02:31:54,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:54,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988595534] [2021-11-13 02:31:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:54,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:54,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:54,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:54,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:31:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:55,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 02:31:55,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 02:31:55,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 02:31:55,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:55,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988595534] [2021-11-13 02:31:55,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988595534] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:31:55,797 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:31:55,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 02:31:55,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128816741] [2021-11-13 02:31:55,801 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:55,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:31:55,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:31:55,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:31:55,851 INFO L87 Difference]: Start difference. First operand has 102 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 66 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 02:31:55,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:55,924 INFO L93 Difference]: Finished difference Result 196 states and 291 transitions. [2021-11-13 02:31:55,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:31:55,928 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 73 [2021-11-13 02:31:55,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:55,940 INFO L225 Difference]: With dead ends: 196 [2021-11-13 02:31:55,941 INFO L226 Difference]: Without dead ends: 97 [2021-11-13 02:31:55,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 144 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 02:31:55,950 INFO L933 BasicCegarLoop]: 136 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, 136 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.19ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:55,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 6.19ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:31:55,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-13 02:31:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-13 02:31:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 62 states have internal predecessors, (76), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 02:31:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 131 transitions. [2021-11-13 02:31:56,025 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 131 transitions. Word has length 73 [2021-11-13 02:31:56,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:56,026 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 131 transitions. [2021-11-13 02:31:56,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 02:31:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 131 transitions. [2021-11-13 02:31:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 02:31:56,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:56,034 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:56,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:56,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:31:56,255 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:56,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:56,256 INFO L85 PathProgramCache]: Analyzing trace with hash -569763587, now seen corresponding path program 1 times [2021-11-13 02:31:56,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:56,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330920840] [2021-11-13 02:31:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:56,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:56,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:56,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:56,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:31:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:56,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:31:56,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 02:31:56,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 02:31:57,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:57,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330920840] [2021-11-13 02:31:57,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330920840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:31:57,425 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:31:57,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-13 02:31:57,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644661010] [2021-11-13 02:31:57,426 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:57,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:31:57,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:57,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:31:57,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:31:57,429 INFO L87 Difference]: Start difference. First operand 97 states and 131 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:31:57,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:57,644 INFO L93 Difference]: Finished difference Result 196 states and 272 transitions. [2021-11-13 02:31:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:31:57,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 73 [2021-11-13 02:31:57,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:57,648 INFO L225 Difference]: With dead ends: 196 [2021-11-13 02:31:57,649 INFO L226 Difference]: Without dead ends: 97 [2021-11-13 02:31:57,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:31:57,652 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 56 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.39ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.84ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:57,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 457 Invalid, 51 Unknown, 0 Unchecked, 11.39ms Time], IncrementalHoareTripleChecker [31 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 142.84ms Time] [2021-11-13 02:31:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-13 02:31:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-13 02:31:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 62 states have internal predecessors, (75), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 02:31:57,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2021-11-13 02:31:57,681 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 73 [2021-11-13 02:31:57,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:57,686 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2021-11-13 02:31:57,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:31:57,686 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2021-11-13 02:31:57,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 02:31:57,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:57,688 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:57,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:57,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:31:57,889 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:57,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:57,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1956548997, now seen corresponding path program 1 times [2021-11-13 02:31:57,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:57,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999987410] [2021-11-13 02:31:57,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:57,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:57,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:57,893 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:57,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:31:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:58,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:31:58,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 02:31:58,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 02:31:58,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:58,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999987410] [2021-11-13 02:31:58,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999987410] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:58,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:31:58,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-13 02:31:58,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391694300] [2021-11-13 02:31:58,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:58,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:31:58,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:31:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:31:58,722 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 02:31:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:58,852 INFO L93 Difference]: Finished difference Result 182 states and 247 transitions. [2021-11-13 02:31:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:31:58,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2021-11-13 02:31:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:58,864 INFO L225 Difference]: With dead ends: 182 [2021-11-13 02:31:58,865 INFO L226 Difference]: Without dead ends: 99 [2021-11-13 02:31:58,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:31:58,871 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 2 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.40ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:58,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 602 Invalid, 42 Unknown, 0 Unchecked, 11.00ms Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 66.40ms Time] [2021-11-13 02:31:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-13 02:31:58,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-13 02:31:58,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 64 states have internal predecessors, (76), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-13 02:31:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2021-11-13 02:31:58,915 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 73 [2021-11-13 02:31:58,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:58,918 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2021-11-13 02:31:58,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 02:31:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2021-11-13 02:31:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-13 02:31:58,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:58,923 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:58,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:59,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:31:59,147 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:59,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:59,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1237560575, now seen corresponding path program 1 times [2021-11-13 02:31:59,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:59,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653922829] [2021-11-13 02:31:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:59,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:59,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:59,150 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:59,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:31:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:59,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:31:59,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 02:31:59,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 02:32:00,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:00,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653922829] [2021-11-13 02:32:00,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653922829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:00,165 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:00,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-13 02:32:00,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258956959] [2021-11-13 02:32:00,165 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:00,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:32:00,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:00,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:32:00,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:32:00,167 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand has 9 states, 8 states have (on average 7.0) internal successors, (56), 9 states have internal predecessors, (56), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:32:00,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:00,470 INFO L93 Difference]: Finished difference Result 187 states and 254 transitions. [2021-11-13 02:32:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:32:00,474 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 9 states have internal predecessors, (56), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 75 [2021-11-13 02:32:00,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:00,476 INFO L225 Difference]: With dead ends: 187 [2021-11-13 02:32:00,476 INFO L226 Difference]: Without dead ends: 99 [2021-11-13 02:32:00,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:32:00,479 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 79 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.14ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 226.98ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:00,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 512 Invalid, 101 Unknown, 0 Unchecked, 5.14ms Time], IncrementalHoareTripleChecker [34 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 226.98ms Time] [2021-11-13 02:32:00,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-13 02:32:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-13 02:32:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 64 states have internal predecessors, (75), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-13 02:32:00,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 132 transitions. [2021-11-13 02:32:00,502 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 132 transitions. Word has length 75 [2021-11-13 02:32:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:00,503 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 132 transitions. [2021-11-13 02:32:00,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 9 states have internal predecessors, (56), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:32:00,503 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 132 transitions. [2021-11-13 02:32:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 02:32:00,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:00,506 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:00,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:00,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:00,727 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:00,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1187141198, now seen corresponding path program 1 times [2021-11-13 02:32:00,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:00,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275210092] [2021-11-13 02:32:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:00,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:00,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:00,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:00,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:32:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:00,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:32:00,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 02:32:01,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 02:32:01,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:01,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275210092] [2021-11-13 02:32:01,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275210092] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:01,761 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:01,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 11 [2021-11-13 02:32:01,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519621687] [2021-11-13 02:32:01,762 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:01,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:32:01,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:01,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:32:01,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:32:01,764 INFO L87 Difference]: Start difference. First operand 99 states and 132 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 11 states have internal predecessors, (59), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:32:02,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:02,227 INFO L93 Difference]: Finished difference Result 196 states and 267 transitions. [2021-11-13 02:32:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:32:02,228 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 11 states have internal predecessors, (59), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 77 [2021-11-13 02:32:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:02,231 INFO L225 Difference]: With dead ends: 196 [2021-11-13 02:32:02,231 INFO L226 Difference]: Without dead ends: 107 [2021-11-13 02:32:02,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:32:02,233 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 96 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 288.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.84ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 350.57ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:02,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 816 Invalid, 174 Unknown, 0 Unchecked, 10.84ms Time], IncrementalHoareTripleChecker [43 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 350.57ms Time] [2021-11-13 02:32:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-13 02:32:02,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2021-11-13 02:32:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 65 states have internal predecessors, (76), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-13 02:32:02,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 133 transitions. [2021-11-13 02:32:02,250 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 133 transitions. Word has length 77 [2021-11-13 02:32:02,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:02,250 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 133 transitions. [2021-11-13 02:32:02,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 11 states have internal predecessors, (59), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:32:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 133 transitions. [2021-11-13 02:32:02,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-13 02:32:02,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:02,253 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:02,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:02,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:02,475 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:02,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1548809988, now seen corresponding path program 1 times [2021-11-13 02:32:02,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:02,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594768983] [2021-11-13 02:32:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:02,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:02,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:02,478 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:02,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:32:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:02,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:32:02,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 02:32:03,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 02:32:03,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:03,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594768983] [2021-11-13 02:32:03,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594768983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:03,350 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:03,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 3] imperfect sequences [] total 8 [2021-11-13 02:32:03,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311077046] [2021-11-13 02:32:03,351 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:03,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:32:03,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:03,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:32:03,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:32:03,353 INFO L87 Difference]: Start difference. First operand 100 states and 133 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 02:32:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:03,725 INFO L93 Difference]: Finished difference Result 192 states and 263 transitions. [2021-11-13 02:32:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:32:03,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) Word has length 78 [2021-11-13 02:32:03,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:03,728 INFO L225 Difference]: With dead ends: 192 [2021-11-13 02:32:03,728 INFO L226 Difference]: Without dead ends: 106 [2021-11-13 02:32:03,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:32:03,730 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 61 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 243.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.20ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 289.18ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:03,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 614 Invalid, 122 Unknown, 0 Unchecked, 4.20ms Time], IncrementalHoareTripleChecker [38 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 289.18ms Time] [2021-11-13 02:32:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-13 02:32:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2021-11-13 02:32:03,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 64 states have (on average 1.203125) internal successors, (77), 66 states have internal predecessors, (77), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-13 02:32:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2021-11-13 02:32:03,765 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 78 [2021-11-13 02:32:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:03,768 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2021-11-13 02:32:03,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 02:32:03,769 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2021-11-13 02:32:03,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-13 02:32:03,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:03,774 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:03,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:03,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:03,995 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:03,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:03,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1185344546, now seen corresponding path program 1 times [2021-11-13 02:32:03,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:03,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199572957] [2021-11-13 02:32:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:03,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:03,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:03,998 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:03,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:32:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:04,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:32:04,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 02:32:04,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 02:32:04,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:04,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199572957] [2021-11-13 02:32:04,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199572957] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:04,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:04,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-13 02:32:04,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563209850] [2021-11-13 02:32:04,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:04,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:32:04,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:04,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:32:04,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:32:04,772 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 02:32:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:04,884 INFO L93 Difference]: Finished difference Result 191 states and 256 transitions. [2021-11-13 02:32:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:32:04,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 86 [2021-11-13 02:32:04,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:04,887 INFO L225 Difference]: With dead ends: 191 [2021-11-13 02:32:04,887 INFO L226 Difference]: Without dead ends: 104 [2021-11-13 02:32:04,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:32:04,889 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 4 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.22ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.53ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:04,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 728 Invalid, 56 Unknown, 0 Unchecked, 3.22ms Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 73.53ms Time] [2021-11-13 02:32:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-13 02:32:04,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2021-11-13 02:32:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 65 states have (on average 1.2) internal successors, (78), 67 states have internal predecessors, (78), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-13 02:32:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2021-11-13 02:32:04,905 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 86 [2021-11-13 02:32:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:04,906 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2021-11-13 02:32:04,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 02:32:04,906 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2021-11-13 02:32:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 02:32:04,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:04,908 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:04,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:05,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:05,131 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:05,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:05,131 INFO L85 PathProgramCache]: Analyzing trace with hash 172862485, now seen corresponding path program 1 times [2021-11-13 02:32:05,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:05,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866657017] [2021-11-13 02:32:05,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:05,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:05,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:05,134 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:05,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:32:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:05,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 02:32:05,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 02:32:06,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 02:32:07,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:07,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866657017] [2021-11-13 02:32:07,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866657017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:07,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1565240782] [2021-11-13 02:32:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:07,629 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:32:07,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:32:07,633 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:32:07,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-13 02:32:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:07,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:32:07,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:32:08,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 02:32:08,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1565240782] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:08,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:32:08,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8, 8] total 23 [2021-11-13 02:32:08,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924496852] [2021-11-13 02:32:08,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:08,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:32:08,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:08,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:32:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-13 02:32:08,739 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-13 02:32:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:08,956 INFO L93 Difference]: Finished difference Result 196 states and 262 transitions. [2021-11-13 02:32:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:32:08,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 88 [2021-11-13 02:32:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:08,960 INFO L225 Difference]: With dead ends: 196 [2021-11-13 02:32:08,960 INFO L226 Difference]: Without dead ends: 108 [2021-11-13 02:32:08,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-11-13 02:32:08,963 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 8 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.75ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.37ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:08,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 838 Invalid, 71 Unknown, 0 Unchecked, 3.75ms Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 92.37ms Time] [2021-11-13 02:32:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-13 02:32:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2021-11-13 02:32:08,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-13 02:32:08,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2021-11-13 02:32:08,978 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 88 [2021-11-13 02:32:08,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:08,978 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2021-11-13 02:32:08,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-13 02:32:08,979 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2021-11-13 02:32:08,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-13 02:32:08,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:08,981 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:09,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:09,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:09,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:32:09,395 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:09,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:09,395 INFO L85 PathProgramCache]: Analyzing trace with hash 759251201, now seen corresponding path program 1 times [2021-11-13 02:32:09,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:09,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905931765] [2021-11-13 02:32:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:09,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:09,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:09,397 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:09,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:32:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:09,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-13 02:32:09,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:09,945 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 02:32:10,208 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-13 02:32:10,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-13 02:32:11,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 9 treesize of output 5 [2021-11-13 02:32:13,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:32:14,879 INFO L354 Elim1Store]: treesize reduction 1590, result has 8.4 percent of original size [2021-11-13 02:32:14,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 7604 treesize of output 4147 [2021-11-13 02:32:14,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:32:14,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:32:25,465 WARN L227 SmtUtils]: Spent 10.47s on a formula simplification. DAG size of input: 193 DAG size of output: 76 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 02:32:25,466 INFO L354 Elim1Store]: treesize reduction 2840, result has 9.7 percent of original size [2021-11-13 02:32:25,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 34754 treesize of output 10876 [2021-11-13 02:32:26,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:32:26,378 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-13 02:32:26,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 25 [2021-11-13 02:32:26,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:32:26,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:32:26,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 778 treesize of output 598 [2021-11-13 02:32:28,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:32:28,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:32:28,678 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-11-13 02:32:28,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 380 treesize of output 188 [2021-11-13 02:32:31,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:32:31,264 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-13 02:32:31,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 610 treesize of output 351 [2021-11-13 02:32:32,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:32:32,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:32:32,070 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-13 02:32:32,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 316 treesize of output 153 [2021-11-13 02:32:32,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:32:32,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:32:32,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:32:32,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 21 [2021-11-13 02:32:32,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:32:32,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:32:32,271 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-13 02:32:32,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 21 [2021-11-13 02:32:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:32:32,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:32:32,294 INFO L354 Elim1Store]: treesize reduction 143, result has 0.7 percent of original size [2021-11-13 02:32:32,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 408 treesize of output 271 [2021-11-13 02:32:32,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:32:32,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:32:32,317 INFO L354 Elim1Store]: treesize reduction 179, result has 0.6 percent of original size [2021-11-13 02:32:32,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 379 treesize of output 277 [2021-11-13 02:32:32,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:32:32,335 INFO L354 Elim1Store]: treesize reduction 269, result has 0.4 percent of original size [2021-11-13 02:32:32,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 280 treesize of output 214 [2021-11-13 02:32:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:32:36,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:38,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3602 treesize of output 3530 [2021-11-13 02:33:14,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2549 treesize of output 2321 [2021-11-13 02:33:43,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-11-13 02:33:50,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:33:50,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 216 treesize of output 204 [2021-11-13 02:33:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 02:33:51,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:51,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905931765] [2021-11-13 02:33:51,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905931765] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:51,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:51,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [23] total 36 [2021-11-13 02:33:51,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302343069] [2021-11-13 02:33:51,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:51,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 02:33:51,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:51,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 02:33:51,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1153, Unknown=9, NotChecked=0, Total=1260 [2021-11-13 02:33:51,180 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-13 02:34:04,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:04,784 INFO L93 Difference]: Finished difference Result 141 states and 194 transitions. [2021-11-13 02:34:04,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 02:34:04,785 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 89 [2021-11-13 02:34:04,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:04,787 INFO L225 Difference]: With dead ends: 141 [2021-11-13 02:34:04,787 INFO L226 Difference]: Without dead ends: 139 [2021-11-13 02:34:04,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=119, Invalid=1510, Unknown=11, NotChecked=0, Total=1640 [2021-11-13 02:34:04,788 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 26 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1522.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.99ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 1755.61ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:04,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 1290 Invalid, 537 Unknown, 0 Unchecked, 8.99ms Time], IncrementalHoareTripleChecker [5 Valid, 245 Invalid, 0 Unknown, 287 Unchecked, 1755.61ms Time] [2021-11-13 02:34:04,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-13 02:34:04,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-11-13 02:34:04,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 87 states have internal predecessors, (97), 43 states have call successors, (43), 9 states have call predecessors, (43), 11 states have return successors, (51), 41 states have call predecessors, (51), 42 states have call successors, (51) [2021-11-13 02:34:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 191 transitions. [2021-11-13 02:34:04,804 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 191 transitions. Word has length 89 [2021-11-13 02:34:04,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:04,804 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 191 transitions. [2021-11-13 02:34:04,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-13 02:34:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 191 transitions. [2021-11-13 02:34:04,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-13 02:34:04,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:04,807 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:04,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:05,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:05,022 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:05,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:05,023 INFO L85 PathProgramCache]: Analyzing trace with hash -50095425, now seen corresponding path program 1 times [2021-11-13 02:34:05,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:05,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034484992] [2021-11-13 02:34:05,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:05,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:05,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:05,027 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:05,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:34:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:05,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-13 02:34:05,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:05,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-11-13 02:34:07,688 INFO L354 Elim1Store]: treesize reduction 1645, result has 19.9 percent of original size [2021-11-13 02:34:07,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 1235 treesize of output 637 [2021-11-13 02:34:07,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4701 treesize of output 4413 [2021-11-13 02:34:59,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:34:59,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:35:00,110 INFO L354 Elim1Store]: treesize reduction 42, result has 70.2 percent of original size [2021-11-13 02:35:00,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 144 treesize of output 206 [2021-11-13 02:35:00,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:35:00,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:35:01,050 INFO L354 Elim1Store]: treesize reduction 34, result has 75.2 percent of original size [2021-11-13 02:35:01,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 156 treesize of output 218 [2021-11-13 02:35:07,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:35:07,801 INFO L354 Elim1Store]: treesize reduction 90, result has 1.1 percent of original size [2021-11-13 02:35:07,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 25 [2021-11-13 02:35:10,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:35:10,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:35:10,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:35:10,746 INFO L354 Elim1Store]: treesize reduction 22, result has 62.7 percent of original size [2021-11-13 02:35:10,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 205 treesize of output 107 [2021-11-13 02:35:25,707 WARN L227 SmtUtils]: Spent 14.11s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 02:35:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 02:35:44,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:46,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-11-13 02:35:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 02:35:46,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:46,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034484992] [2021-11-13 02:35:46,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034484992] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:46,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:35:46,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [18] total 27 [2021-11-13 02:35:46,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32485036] [2021-11-13 02:35:46,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:46,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:35:46,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:46,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:35:46,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-11-13 02:35:46,902 INFO L87 Difference]: Start difference. First operand 138 states and 191 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-13 02:35:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:49,647 INFO L93 Difference]: Finished difference Result 233 states and 326 transitions. [2021-11-13 02:35:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 02:35:49,648 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 89 [2021-11-13 02:35:49,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:49,650 INFO L225 Difference]: With dead ends: 233 [2021-11-13 02:35:49,651 INFO L226 Difference]: Without dead ends: 144 [2021-11-13 02:35:49,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-11-13 02:35:49,653 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 54 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1784.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.52ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2023.10ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:49,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 857 Invalid, 276 Unknown, 0 Unchecked, 5.52ms Time], IncrementalHoareTripleChecker [51 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 2023.10ms Time] [2021-11-13 02:35:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-13 02:35:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-11-13 02:35:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 92 states have internal predecessors, (102), 43 states have call successors, (43), 9 states have call predecessors, (43), 12 states have return successors, (56), 41 states have call predecessors, (56), 42 states have call successors, (56) [2021-11-13 02:35:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 201 transitions. [2021-11-13 02:35:49,674 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 201 transitions. Word has length 89 [2021-11-13 02:35:49,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:49,675 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 201 transitions. [2021-11-13 02:35:49,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-13 02:35:49,676 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 201 transitions. [2021-11-13 02:35:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-13 02:35:49,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:49,678 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:49,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:49,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:35:49,886 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:49,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1974343619, now seen corresponding path program 1 times [2021-11-13 02:35:49,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:49,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737876690] [2021-11-13 02:35:49,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:49,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:49,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:49,891 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:49,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:35:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:50,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 02:35:50,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:51,177 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 02:35:51,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-13 02:35:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 02:35:57,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:59,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-13 02:36:04,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-13 02:36:07,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:36:07,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-13 02:36:44,043 WARN L227 SmtUtils]: Spent 12.92s on a formula simplification. DAG size of input: 61 DAG size of output: 46 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 02:36:44,043 INFO L354 Elim1Store]: treesize reduction 67, result has 55.3 percent of original size [2021-11-13 02:36:44,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 468 treesize of output 496 [2021-11-13 02:36:44,472 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-13 02:36:44,473 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 440 treesize of output 460 [2021-11-13 02:37:46,497 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2021-11-13 02:37:59,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:37:59,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-13 02:37:59,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-13 02:38:48,252 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-13 02:38:48,478 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-13 02:38:48,699 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-13 02:39:02,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:39:02,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-11-13 02:39:02,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:39:02,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:39:02,699 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-13 02:39:02,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-11-13 02:39:02,807 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-13 02:39:02,808 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 15 treesize of output 9 [2021-11-13 02:39:03,117 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-13 02:39:05,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:39:05,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:39:05,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 88 [2021-11-13 02:39:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 02:39:07,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:07,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737876690] [2021-11-13 02:39:07,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737876690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:07,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1536903105] [2021-11-13 02:39:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:07,801 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:07,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:39:07,807 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:39:07,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f645c6ec-17cc-4e62-8a55-71a1392edfef/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 02:39:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:08,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-13 02:39:08,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:08,822 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 02:39:08,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 56 [2021-11-13 02:39:08,909 INFO L354 Elim1Store]: treesize reduction 47, result has 24.2 percent of original size [2021-11-13 02:39:08,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2021-11-13 02:39:50,703 INFO L354 Elim1Store]: treesize reduction 222, result has 0.4 percent of original size [2021-11-13 02:39:50,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 114 treesize of output 1 [2021-11-13 02:39:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 02:39:50,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:12,863 WARN L838 $PredicateComparison]: unable to prove that (or (= |c_aws_linked_list_node_next_is_valid_#in~node.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (bvadd (_ bv8 64) (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)))) (and (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_7| (_ BitVec 64))) (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_7| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_7|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6|))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_7| (_ BitVec 64))) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_7|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6|)) (bvadd (_ bv8 64) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_7|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6|))) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_7|)) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_7| (_ BitVec 64))) (= (bvadd (_ bv16 64) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6|) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_7|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6|)))) (= |c_aws_linked_list_node_next_is_valid_#res| (_ bv0 8))) is different from false [2021-11-13 02:40:20,966 INFO L354 Elim1Store]: treesize reduction 321, result has 34.5 percent of original size [2021-11-13 02:40:20,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 2504 treesize of output 2360 [2021-11-13 02:40:20,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9291 treesize of output 8915 [2021-11-13 02:40:22,238 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-13 02:40:22,238 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 6850 treesize of output 6834