./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8 --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 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:08:20,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:08:20,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:08:20,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:08:20,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:08:20,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:08:20,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:08:20,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:08:20,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:08:20,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:08:20,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:08:20,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:08:20,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:08:20,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:08:20,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:08:20,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:08:20,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:08:20,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:08:20,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:08:20,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:08:20,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:08:20,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:08:20,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:08:20,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:08:20,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:08:20,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:08:20,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:08:20,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:08:20,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:08:20,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:08:20,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:08:20,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:08:20,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:08:20,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:08:20,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:08:20,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:08:20,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:08:20,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:08:20,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:08:20,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:08:20,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:08:20,547 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:08:20,577 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:08:20,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:08:20,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:08:20,579 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:08:20,580 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:08:20,580 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:08:20,580 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:08:20,581 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:08:20,581 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:08:20,582 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:08:20,582 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:08:20,582 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:08:20,583 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:08:20,583 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:08:20,584 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:08:20,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:08:20,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:08:20,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:08:20,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:08:20,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:08:20,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:08:20,587 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:08:20,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:08:20,588 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:08:20,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:08:20,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:08:20,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:08:20,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:20,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:08:20,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:08:20,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:08:20,591 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:08:20,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:08:20,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:08:20,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:08:20,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:08:20,593 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_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d [2021-11-07 01:08:20,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:08:20,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:08:20,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:08:20,933 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:08:20,934 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:08:20,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-07 01:08:20,999 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/data/4565ab29d/ad364e7d471346f9b4862b43fc718b71/FLAG74cf92ff5 [2021-11-07 01:08:21,833 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:08:21,834 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-07 01:08:21,885 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/data/4565ab29d/ad364e7d471346f9b4862b43fc718b71/FLAG74cf92ff5 [2021-11-07 01:08:22,359 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/data/4565ab29d/ad364e7d471346f9b4862b43fc718b71 [2021-11-07 01:08:22,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:08:22,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:08:22,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:22,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:08:22,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:08:22,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:22" (1/1) ... [2021-11-07 01:08:22,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dc2ed20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:22, skipping insertion in model container [2021-11-07 01:08:22,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:22" (1/1) ... [2021-11-07 01:08:22,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:08:22,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:22,820 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_e7723e0a-56e5-4ec5-8eb6-9d167e525680/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-07 01:08:22,826 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_e7723e0a-56e5-4ec5-8eb6-9d167e525680/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-07 01:08:22,844 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 01:08:22,850 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 01:08:23,678 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:23,687 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:23,689 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:23,690 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:23,692 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:23,710 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:23,714 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:23,721 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:23,724 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:23,728 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:23,730 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:23,731 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:23,732 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:24,066 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 01:08:24,067 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 01:08:24,068 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 01:08:24,069 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 01:08:24,071 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 01:08:24,071 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 01:08:24,072 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 01:08:24,073 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 01:08:24,073 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 01:08:24,074 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 01:08:24,200 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 01:08:24,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:24,242 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) [2021-11-07 01:08:24,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2216e1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:24, skipping insertion in model container [2021-11-07 01:08:24,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:24,243 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:08:24,245 INFO L168 Benchmark]: Toolchain (without parser) took 1880.55 ms. Allocated memory is still 115.3 MB. Free memory was 78.0 MB in the beginning and 58.0 MB in the end (delta: 20.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:08:24,246 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 115.3 MB. Free memory is still 70.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:08:24,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1868.72 ms. Allocated memory is still 115.3 MB. Free memory was 78.0 MB in the beginning and 58.0 MB in the end (delta: 20.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:08:24,249 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 115.3 MB. Free memory is still 70.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1868.72 ms. Allocated memory is still 115.3 MB. Free memory was 78.0 MB in the beginning and 58.0 MB in the end (delta: 20.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * 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_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8 --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 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:08:26,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:08:26,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:08:26,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:08:26,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:08:26,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:08:26,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:08:26,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:08:26,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:08:26,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:08:26,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:08:26,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:08:26,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:08:26,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:08:26,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:08:26,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:08:26,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:08:26,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:08:26,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:08:26,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:08:26,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:08:26,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:08:26,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:08:26,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:08:26,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:08:26,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:08:26,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:08:26,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:08:26,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:08:26,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:08:26,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:08:26,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:08:26,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:08:26,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:08:26,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:08:26,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:08:26,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:08:26,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:08:26,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:08:26,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:08:26,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:08:26,759 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:08:26,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:08:26,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:08:26,811 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:08:26,811 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:08:26,811 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:08:26,811 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:08:26,811 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:08:26,812 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:08:26,813 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:08:26,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:08:26,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:08:26,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:08:26,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:08:26,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:08:26,817 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:08:26,817 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:08:26,818 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:08:26,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:08:26,818 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:08:26,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:08:26,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:08:26,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:08:26,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:08:26,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:26,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:08:26,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:08:26,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:08:26,820 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:08:26,820 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:08:26,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:08:26,821 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:08:26,821 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:08:26,821 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_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d [2021-11-07 01:08:27,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:08:27,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:08:27,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:08:27,290 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:08:27,291 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:08:27,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-07 01:08:27,375 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/data/777fd3a3c/e0e57067d46444319f0bc0007a6721df/FLAGfcc329873 [2021-11-07 01:08:28,316 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:08:28,316 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-07 01:08:28,350 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/data/777fd3a3c/e0e57067d46444319f0bc0007a6721df/FLAGfcc329873 [2021-11-07 01:08:28,861 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/data/777fd3a3c/e0e57067d46444319f0bc0007a6721df [2021-11-07 01:08:28,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:08:28,864 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:08:28,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:28,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:08:28,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:08:28,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:28" (1/1) ... [2021-11-07 01:08:28,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5750c5af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:28, skipping insertion in model container [2021-11-07 01:08:28,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:28" (1/1) ... [2021-11-07 01:08:28,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:08:28,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:29,303 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_e7723e0a-56e5-4ec5-8eb6-9d167e525680/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-07 01:08:29,311 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_e7723e0a-56e5-4ec5-8eb6-9d167e525680/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-07 01:08:29,335 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 01:08:29,341 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 01:08:30,122 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,123 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,123 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,124 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,125 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,157 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,158 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,159 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,160 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,162 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,172 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,173 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,174 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,515 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 01:08:30,516 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 01:08:30,517 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 01:08:30,519 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 01:08:30,520 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 01:08:30,521 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 01:08:30,522 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 01:08:30,523 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 01:08:30,523 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 01:08:30,524 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 01:08:30,695 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 01:08:30,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:30,744 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:08:30,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:30,811 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_e7723e0a-56e5-4ec5-8eb6-9d167e525680/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-07 01:08:30,811 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_e7723e0a-56e5-4ec5-8eb6-9d167e525680/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-07 01:08:30,813 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 01:08:30,813 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 01:08:30,853 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,853 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,854 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,854 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,855 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,863 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,864 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,865 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,866 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,867 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,868 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,868 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,869 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:30,907 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 01:08:30,908 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 01:08:30,909 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 01:08:30,910 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 01:08:30,911 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 01:08:30,911 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 01:08:30,912 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 01:08:30,913 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 01:08:30,913 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 01:08:30,914 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 01:08:30,938 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 01:08:30,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:30,968 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:08:30,997 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_e7723e0a-56e5-4ec5-8eb6-9d167e525680/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-07 01:08:30,997 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_e7723e0a-56e5-4ec5-8eb6-9d167e525680/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-07 01:08:30,999 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 01:08:31,000 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 01:08:31,045 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:31,045 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:31,046 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:31,046 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:31,047 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:31,054 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:31,055 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:31,056 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:31,057 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:31,058 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:31,059 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:31,062 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:31,063 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:08:31,130 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 01:08:31,131 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 01:08:31,132 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 01:08:31,132 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 01:08:31,133 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 01:08:31,134 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 01:08:31,134 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 01:08:31,135 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 01:08:31,136 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 01:08:31,136 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 01:08:31,175 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 01:08:31,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:31,518 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:08:31,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:31 WrapperNode [2021-11-07 01:08:31,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:31,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:08:31,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:08:31,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:08:31,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:31" (1/1) ... [2021-11-07 01:08:31,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:31" (1/1) ... [2021-11-07 01:08:31,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:08:31,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:08:31,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:08:31,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:08:31,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:31" (1/1) ... [2021-11-07 01:08:31,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:31" (1/1) ... [2021-11-07 01:08:31,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:31" (1/1) ... [2021-11-07 01:08:31,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:31" (1/1) ... [2021-11-07 01:08:31,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:31" (1/1) ... [2021-11-07 01:08:31,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:31" (1/1) ... [2021-11-07 01:08:31,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:31" (1/1) ... [2021-11-07 01:08:31,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:08:31,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:08:31,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:08:31,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:08:31,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:31" (1/1) ... [2021-11-07 01:08:31,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:31,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:08:31,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:08:31,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:08:31,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:08:31,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:08:31,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:08:31,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:08:31,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:08:31,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:08:31,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:08:31,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:08:32,774 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:08:32,775 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2021-11-07 01:08:32,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:08:32 BoogieIcfgContainer [2021-11-07 01:08:32,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:08:32,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:08:32,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:08:32,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:08:32,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:08:28" (1/3) ... [2021-11-07 01:08:32,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211050a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:08:32, skipping insertion in model container [2021-11-07 01:08:32,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:31" (2/3) ... [2021-11-07 01:08:32,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211050a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:08:32, skipping insertion in model container [2021-11-07 01:08:32,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:08:32" (3/3) ... [2021-11-07 01:08:32,804 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_init_harness.i [2021-11-07 01:08:32,811 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:08:32,811 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-07 01:08:32,881 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:08:32,902 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 [2021-11-07 01:08:32,902 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-07 01:08:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 63 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:32,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:08:32,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:32,926 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:32,926 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:32,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:32,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1119392047, now seen corresponding path program 1 times [2021-11-07 01:08:32,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:32,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855570613] [2021-11-07 01:08:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:32,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:32,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:32,963 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:33,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:08:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:33,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:08:33,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:33,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:33,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:33,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855570613] [2021-11-07 01:08:33,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855570613] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:33,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:33,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:08:33,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220736120] [2021-11-07 01:08:33,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:08:33,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:33,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:08:33,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:08:33,348 INFO L87 Difference]: Start difference. First operand has 64 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 63 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:33,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:33,368 INFO L93 Difference]: Finished difference Result 125 states and 180 transitions. [2021-11-07 01:08:33,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:08:33,370 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:08:33,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:33,378 INFO L225 Difference]: With dead ends: 125 [2021-11-07 01:08:33,379 INFO L226 Difference]: Without dead ends: 59 [2021-11-07 01:08:33,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:08:33,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-07 01:08:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-07 01:08:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 58 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 80 transitions. [2021-11-07 01:08:33,425 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 80 transitions. Word has length 15 [2021-11-07 01:08:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:33,426 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 80 transitions. [2021-11-07 01:08:33,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 80 transitions. [2021-11-07 01:08:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:08:33,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:33,427 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:33,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:33,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:33,648 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:33,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:33,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1706198061, now seen corresponding path program 1 times [2021-11-07 01:08:33,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:33,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332151779] [2021-11-07 01:08:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:33,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:33,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:33,652 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:33,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:08:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:33,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:08:33,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:33,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-07 01:08:33,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-07 01:08:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:34,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:34,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:34,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332151779] [2021-11-07 01:08:34,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332151779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:34,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:34,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-07 01:08:34,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862529247] [2021-11-07 01:08:34,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:08:34,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:34,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:08:34,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:08:34,663 INFO L87 Difference]: Start difference. First operand 59 states and 80 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:34,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:34,993 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2021-11-07 01:08:34,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:08:34,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:08:34,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:34,995 INFO L225 Difference]: With dead ends: 96 [2021-11-07 01:08:34,995 INFO L226 Difference]: Without dead ends: 60 [2021-11-07 01:08:34,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:08:34,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-07 01:08:35,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-07 01:08:35,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:35,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2021-11-07 01:08:35,005 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 15 [2021-11-07 01:08:35,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:35,006 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2021-11-07 01:08:35,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:35,006 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2021-11-07 01:08:35,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:08:35,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:35,007 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:35,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:35,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:35,226 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:35,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:35,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1704351019, now seen corresponding path program 1 times [2021-11-07 01:08:35,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:35,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769295889] [2021-11-07 01:08:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:35,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:35,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:35,230 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:35,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:08:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:35,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:08:35,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:35,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-07 01:08:35,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:08:35,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 38 [2021-11-07 01:08:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:35,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:35,978 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 28 treesize of output 26 [2021-11-07 01:08:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:36,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:36,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769295889] [2021-11-07 01:08:36,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769295889] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:36,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:36,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-07 01:08:36,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053466993] [2021-11-07 01:08:36,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:08:36,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:36,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:08:36,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:08:36,018 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:36,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:36,361 INFO L93 Difference]: Finished difference Result 111 states and 150 transitions. [2021-11-07 01:08:36,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:08:36,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:08:36,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:36,363 INFO L225 Difference]: With dead ends: 111 [2021-11-07 01:08:36,363 INFO L226 Difference]: Without dead ends: 63 [2021-11-07 01:08:36,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:08:36,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-07 01:08:36,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-11-07 01:08:36,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 61 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:36,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2021-11-07 01:08:36,371 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 15 [2021-11-07 01:08:36,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:36,371 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2021-11-07 01:08:36,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2021-11-07 01:08:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:08:36,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:36,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:36,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 01:08:36,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:36,591 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:36,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:36,592 INFO L85 PathProgramCache]: Analyzing trace with hash 70656343, now seen corresponding path program 1 times [2021-11-07 01:08:36,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:36,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991965468] [2021-11-07 01:08:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:36,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:36,593 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:36,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:08:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:36,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:08:36,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:36,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-07 01:08:36,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-07 01:08:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:37,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:37,280 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 27 treesize of output 25 [2021-11-07 01:08:37,287 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 27 [2021-11-07 01:08:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:37,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:37,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991965468] [2021-11-07 01:08:37,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991965468] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:37,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:37,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 7 [2021-11-07 01:08:37,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528163144] [2021-11-07 01:08:37,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:08:37,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:37,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:08:37,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:08:37,299 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:37,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:37,737 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2021-11-07 01:08:37,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:08:37,738 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:08:37,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:37,739 INFO L225 Difference]: With dead ends: 118 [2021-11-07 01:08:37,739 INFO L226 Difference]: Without dead ends: 67 [2021-11-07 01:08:37,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:08:37,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-07 01:08:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-11-07 01:08:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 61 states have (on average 1.3934426229508197) internal successors, (85), 63 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:37,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 85 transitions. [2021-11-07 01:08:37,747 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 85 transitions. Word has length 15 [2021-11-07 01:08:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:37,747 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 85 transitions. [2021-11-07 01:08:37,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 85 transitions. [2021-11-07 01:08:37,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:08:37,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:37,748 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:37,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:37,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:37,960 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:37,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:37,961 INFO L85 PathProgramCache]: Analyzing trace with hash 750714713, now seen corresponding path program 1 times [2021-11-07 01:08:37,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:37,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206943747] [2021-11-07 01:08:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:37,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:37,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:37,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:37,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:08:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:38,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:08:38,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:38,340 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-11-07 01:08:38,340 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 3 case distinctions, treesize of input 26 treesize of output 35 [2021-11-07 01:08:38,501 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 01:08:38,502 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 68 treesize of output 38 [2021-11-07 01:08:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:38,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:38,621 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 26 treesize of output 24 [2021-11-07 01:08:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:38,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:38,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206943747] [2021-11-07 01:08:38,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206943747] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:38,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:38,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-07 01:08:38,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048691410] [2021-11-07 01:08:38,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:08:38,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:38,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:08:38,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:08:38,639 INFO L87 Difference]: Start difference. First operand 64 states and 85 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:39,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:39,097 INFO L93 Difference]: Finished difference Result 118 states and 156 transitions. [2021-11-07 01:08:39,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:08:39,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:08:39,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:39,098 INFO L225 Difference]: With dead ends: 118 [2021-11-07 01:08:39,098 INFO L226 Difference]: Without dead ends: 59 [2021-11-07 01:08:39,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:08:39,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-07 01:08:39,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-07 01:08:39,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2021-11-07 01:08:39,106 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 15 [2021-11-07 01:08:39,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:39,106 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2021-11-07 01:08:39,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2021-11-07 01:08:39,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:08:39,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:39,112 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:39,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:39,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:39,330 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:39,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:39,331 INFO L85 PathProgramCache]: Analyzing trace with hash -396643720, now seen corresponding path program 1 times [2021-11-07 01:08:39,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:39,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817179605] [2021-11-07 01:08:39,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:39,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:39,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:39,333 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:39,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:08:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:39,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:08:39,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:39,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:39,733 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:39,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817179605] [2021-11-07 01:08:39,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817179605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:39,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:39,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:08:39,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322796261] [2021-11-07 01:08:39,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:08:39,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:39,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:08:39,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:08:39,735 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:39,905 INFO L93 Difference]: Finished difference Result 100 states and 125 transitions. [2021-11-07 01:08:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:08:39,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:08:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:39,907 INFO L225 Difference]: With dead ends: 100 [2021-11-07 01:08:39,907 INFO L226 Difference]: Without dead ends: 63 [2021-11-07 01:08:39,907 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:08:39,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-07 01:08:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-11-07 01:08:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 58 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-11-07 01:08:39,915 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 17 [2021-11-07 01:08:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:39,915 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-11-07 01:08:39,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:39,916 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-11-07 01:08:39,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:08:39,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:39,917 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:39,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:40,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:40,134 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:40,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:40,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1873340090, now seen corresponding path program 1 times [2021-11-07 01:08:40,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:40,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241352144] [2021-11-07 01:08:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:40,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:40,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:40,136 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:40,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:08:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:40,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:08:40,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:40,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:40,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:40,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241352144] [2021-11-07 01:08:40,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241352144] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:40,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:40,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-07 01:08:40,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392709462] [2021-11-07 01:08:40,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:08:40,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:08:40,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:08:40,575 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:40,785 INFO L93 Difference]: Finished difference Result 136 states and 169 transitions. [2021-11-07 01:08:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:08:40,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 01:08:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:40,787 INFO L225 Difference]: With dead ends: 136 [2021-11-07 01:08:40,787 INFO L226 Difference]: Without dead ends: 98 [2021-11-07 01:08:40,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:08:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-07 01:08:40,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 60. [2021-11-07 01:08:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 59 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2021-11-07 01:08:40,796 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 19 [2021-11-07 01:08:40,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:40,797 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2021-11-07 01:08:40,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2021-11-07 01:08:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:08:40,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:40,798 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:40,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:41,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:41,015 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:41,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:41,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1055948096, now seen corresponding path program 1 times [2021-11-07 01:08:41,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:41,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967141970] [2021-11-07 01:08:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:41,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:41,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:41,017 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:41,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:08:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:41,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:08:41,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:41,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:41,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:41,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967141970] [2021-11-07 01:08:41,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967141970] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:41,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:41,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 3] imperfect sequences [] total 7 [2021-11-07 01:08:41,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805497950] [2021-11-07 01:08:41,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:08:41,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:41,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:08:41,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:08:41,445 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:41,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:41,812 INFO L93 Difference]: Finished difference Result 151 states and 187 transitions. [2021-11-07 01:08:41,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:08:41,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 01:08:41,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:41,815 INFO L225 Difference]: With dead ends: 151 [2021-11-07 01:08:41,815 INFO L226 Difference]: Without dead ends: 113 [2021-11-07 01:08:41,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:08:41,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-07 01:08:41,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 63. [2021-11-07 01:08:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 62 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2021-11-07 01:08:41,844 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 20 [2021-11-07 01:08:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:41,844 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2021-11-07 01:08:41,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2021-11-07 01:08:41,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 01:08:41,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:41,845 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:41,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:42,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:42,047 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:42,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:42,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2137464374, now seen corresponding path program 1 times [2021-11-07 01:08:42,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:42,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746622763] [2021-11-07 01:08:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:42,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:42,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:42,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:42,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:08:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:42,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 01:08:42,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:42,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-07 01:08:42,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-07 01:08:43,668 INFO L354 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2021-11-07 01:08:43,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 134 treesize of output 88 [2021-11-07 01:08:43,683 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-07 01:08:43,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 34 [2021-11-07 01:08:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:43,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:44,469 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 01:08:44,469 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 3792 treesize of output 1 [2021-11-07 01:08:44,481 INFO L354 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2021-11-07 01:08:44,482 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 3818 treesize of output 1 [2021-11-07 01:08:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:44,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:44,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746622763] [2021-11-07 01:08:44,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746622763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:44,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:44,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 9] imperfect sequences [] total 16 [2021-11-07 01:08:44,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615715445] [2021-11-07 01:08:44,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:08:44,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:44,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:08:44,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:08:44,492 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:48,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:48,246 INFO L93 Difference]: Finished difference Result 217 states and 265 transitions. [2021-11-07 01:08:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:08:48,247 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 01:08:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:48,250 INFO L225 Difference]: With dead ends: 217 [2021-11-07 01:08:48,250 INFO L226 Difference]: Without dead ends: 178 [2021-11-07 01:08:48,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:08:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-07 01:08:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 69. [2021-11-07 01:08:48,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 68 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2021-11-07 01:08:48,279 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 25 [2021-11-07 01:08:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:48,281 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2021-11-07 01:08:48,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:48,281 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2021-11-07 01:08:48,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 01:08:48,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:48,283 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:48,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:48,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:48,501 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:48,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:48,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1348156296, now seen corresponding path program 1 times [2021-11-07 01:08:48,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:48,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950624055] [2021-11-07 01:08:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:48,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:48,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:48,503 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:48,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:08:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:48,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:08:48,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:49,196 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 35 treesize of output 27 [2021-11-07 01:08:49,199 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 27 treesize of output 19 [2021-11-07 01:08:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:49,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:49,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:49,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950624055] [2021-11-07 01:08:49,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950624055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:49,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:49,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 12 [2021-11-07 01:08:49,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931235845] [2021-11-07 01:08:49,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:08:49,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:49,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:08:49,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:08:49,561 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:53,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:53,211 INFO L93 Difference]: Finished difference Result 291 states and 378 transitions. [2021-11-07 01:08:53,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 01:08:53,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 01:08:53,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:53,214 INFO L225 Difference]: With dead ends: 291 [2021-11-07 01:08:53,214 INFO L226 Difference]: Without dead ends: 243 [2021-11-07 01:08:53,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=331, Invalid=1001, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 01:08:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-07 01:08:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 82. [2021-11-07 01:08:53,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 79 states have (on average 1.3417721518987342) internal successors, (106), 81 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2021-11-07 01:08:53,232 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 25 [2021-11-07 01:08:53,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:53,232 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2021-11-07 01:08:53,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:53,232 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2021-11-07 01:08:53,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 01:08:53,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:53,233 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:53,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:53,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:53,436 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:53,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:53,436 INFO L85 PathProgramCache]: Analyzing trace with hash 955129286, now seen corresponding path program 1 times [2021-11-07 01:08:53,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:53,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726586797] [2021-11-07 01:08:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:53,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:53,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:53,437 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:53,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:08:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:53,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:08:53,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:53,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:53,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:53,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726586797] [2021-11-07 01:08:53,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726586797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:53,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:53,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-07 01:08:53,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977411180] [2021-11-07 01:08:53,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:08:53,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:53,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:08:53,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:08:53,999 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:54,336 INFO L93 Difference]: Finished difference Result 180 states and 232 transitions. [2021-11-07 01:08:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:08:54,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 01:08:54,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:54,337 INFO L225 Difference]: With dead ends: 180 [2021-11-07 01:08:54,337 INFO L226 Difference]: Without dead ends: 116 [2021-11-07 01:08:54,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:08:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-07 01:08:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2021-11-07 01:08:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.3246753246753247) internal successors, (102), 79 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2021-11-07 01:08:54,352 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 25 [2021-11-07 01:08:54,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:54,352 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2021-11-07 01:08:54,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2021-11-07 01:08:54,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:08:54,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:54,354 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:54,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:08:54,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:54,572 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:54,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash -313030260, now seen corresponding path program 1 times [2021-11-07 01:08:54,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:54,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618584224] [2021-11-07 01:08:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:54,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:54,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:54,574 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:54,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:08:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:54,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:08:54,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:55,337 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 32 treesize of output 24 [2021-11-07 01:08:55,340 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 21 treesize of output 13 [2021-11-07 01:08:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:55,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:55,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:55,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618584224] [2021-11-07 01:08:55,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618584224] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:08:55,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1280731142] [2021-11-07 01:08:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:55,639 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:08:55,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:08:55,665 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:08:55,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 01:08:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:56,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 01:08:56,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:56,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-07 01:08:56,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-07 01:08:57,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:08:57,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 51 [2021-11-07 01:08:57,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:08:57,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 16 [2021-11-07 01:08:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:57,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:57,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1280731142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:08:57,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107508701] [2021-11-07 01:08:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:57,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:08:57,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:08:57,652 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:08:57,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 01:08:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:58,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 01:08:58,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:58,205 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-11-07 01:08:58,206 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 3 case distinctions, treesize of input 26 treesize of output 35 [2021-11-07 01:09:00,643 INFO L354 Elim1Store]: treesize reduction 66, result has 37.1 percent of original size [2021-11-07 01:09:00,644 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 66 treesize of output 74 [2021-11-07 01:09:00,654 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 59 treesize of output 51 [2021-11-07 01:09:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:00,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:00,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107508701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:09:00,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:09:00,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 9, 8] total 23 [2021-11-07 01:09:00,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534118589] [2021-11-07 01:09:00,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 01:09:00,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:00,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 01:09:00,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:09:00,926 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:07,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:07,227 INFO L93 Difference]: Finished difference Result 291 states and 370 transitions. [2021-11-07 01:09:07,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 01:09:07,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 01:09:07,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:07,230 INFO L225 Difference]: With dead ends: 291 [2021-11-07 01:09:07,230 INFO L226 Difference]: Without dead ends: 240 [2021-11-07 01:09:07,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=606, Invalid=2363, Unknown=1, NotChecked=0, Total=2970 [2021-11-07 01:09:07,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-07 01:09:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 87. [2021-11-07 01:09:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 84 states have (on average 1.2976190476190477) internal successors, (109), 86 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:07,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2021-11-07 01:09:07,249 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 27 [2021-11-07 01:09:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:07,249 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2021-11-07 01:09:07,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2021-11-07 01:09:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 01:09:07,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:07,251 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:09:07,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:07,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:07,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-07 01:09:07,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:09:07,869 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:09:07,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:07,869 INFO L85 PathProgramCache]: Analyzing trace with hash -113952210, now seen corresponding path program 1 times [2021-11-07 01:09:07,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:07,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698974148] [2021-11-07 01:09:07,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:07,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:07,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:07,872 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:07,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:09:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:08,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:09:08,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:09:08,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:09:08,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:08,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698974148] [2021-11-07 01:09:08,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698974148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:08,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:08,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 01:09:08,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491117792] [2021-11-07 01:09:08,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:09:08,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:08,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:09:08,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:09:08,518 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:08,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:08,702 INFO L93 Difference]: Finished difference Result 125 states and 153 transitions. [2021-11-07 01:09:08,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:09:08,702 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 01:09:08,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:08,703 INFO L225 Difference]: With dead ends: 125 [2021-11-07 01:09:08,703 INFO L226 Difference]: Without dead ends: 117 [2021-11-07 01:09:08,704 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:09:08,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-07 01:09:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 89. [2021-11-07 01:09:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 86 states have (on average 1.2790697674418605) internal successors, (110), 88 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 110 transitions. [2021-11-07 01:09:08,719 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 110 transitions. Word has length 28 [2021-11-07 01:09:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:08,719 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 110 transitions. [2021-11-07 01:09:08,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 110 transitions. [2021-11-07 01:09:08,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:09:08,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:08,721 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:09:08,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:09:08,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:08,928 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:09:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:08,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1451496965, now seen corresponding path program 1 times [2021-11-07 01:09:08,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:08,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877481760] [2021-11-07 01:09:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:08,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:08,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:08,930 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:08,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:09:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:09,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 01:09:09,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:10,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:10,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:09:10,604 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 [2021-11-07 01:09:10,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:09:10,628 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 35 treesize of output 38 [2021-11-07 01:09:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:11,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:11,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877481760] [2021-11-07 01:09:11,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877481760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:09:11,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [420701731] [2021-11-07 01:09:11,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:11,074 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:09:11,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:09:11,075 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:09:11,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 01:09:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:11,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 01:09:11,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:11,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:11,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:11,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:11,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:11,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:11,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:11,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-07 01:09:11,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:11,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:12,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:12,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:12,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:12,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:12,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-07 01:09:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:14,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:15,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [420701731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:09:15,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347864389] [2021-11-07 01:09:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:15,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:09:15,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:09:15,868 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:09:15,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 01:09:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:16,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 01:09:16,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:16,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:16,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:16,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:16,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:16,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:16,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:16,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-07 01:09:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:19,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:19,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:09:19,855 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 28 treesize of output 31 [2021-11-07 01:09:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:20,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347864389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:09:20,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:09:20,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 17, 16] total 49 [2021-11-07 01:09:20,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876052446] [2021-11-07 01:09:20,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 01:09:20,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:20,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 01:09:20,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1979, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 01:09:20,988 INFO L87 Difference]: Start difference. First operand 89 states and 110 transitions. Second operand has 49 states, 49 states have (on average 3.2448979591836733) internal successors, (159), 49 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:24,935 INFO L93 Difference]: Finished difference Result 145 states and 183 transitions. [2021-11-07 01:09:24,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:09:24,937 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.2448979591836733) internal successors, (159), 49 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 01:09:24,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:24,938 INFO L225 Difference]: With dead ends: 145 [2021-11-07 01:09:24,938 INFO L226 Difference]: Without dead ends: 78 [2021-11-07 01:09:24,940 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 01:09:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-07 01:09:24,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2021-11-07 01:09:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2021-11-07 01:09:24,958 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 33 [2021-11-07 01:09:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:24,958 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2021-11-07 01:09:24,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.2448979591836733) internal successors, (159), 49 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2021-11-07 01:09:24,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:09:24,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:24,961 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:24,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:25,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:25,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:25,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:25,566 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:09:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:25,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1433523821, now seen corresponding path program 1 times [2021-11-07 01:09:25,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:25,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736483647] [2021-11-07 01:09:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:25,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:25,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:25,568 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:25,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:09:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:26,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:09:26,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:26,997 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 35 treesize of output 27 [2021-11-07 01:09:27,001 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 27 treesize of output 19 [2021-11-07 01:09:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:09:27,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:29,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:09:29,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-07 01:09:29,737 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-07 01:09:29,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-07 01:09:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:09:29,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:29,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736483647] [2021-11-07 01:09:29,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736483647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:29,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:29,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-07 01:09:29,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139350792] [2021-11-07 01:09:29,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:09:29,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:29,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:09:29,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:09:29,886 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:30,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:30,687 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2021-11-07 01:09:30,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:09:30,688 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:09:30,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:30,689 INFO L225 Difference]: With dead ends: 109 [2021-11-07 01:09:30,689 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 01:09:30,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:09:30,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 01:09:30,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-11-07 01:09:30,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 77 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2021-11-07 01:09:30,701 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 45 [2021-11-07 01:09:30,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:30,701 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2021-11-07 01:09:30,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:30,701 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2021-11-07 01:09:30,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:09:30,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:30,702 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:30,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:30,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:30,908 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:09:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:30,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1431676779, now seen corresponding path program 1 times [2021-11-07 01:09:30,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:30,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981293112] [2021-11-07 01:09:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:30,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:30,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:30,910 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:30,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:09:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:09:31,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:31,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:31,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:31,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:31,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:31,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:31,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:31,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-07 01:09:31,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:31,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:31,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:31,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:31,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:31,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:31,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-07 01:09:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:09:33,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:34,124 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 746 treesize of output 734 [2021-11-07 01:09:34,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:34,998 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 812 treesize of output 788 [2021-11-07 01:09:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:09:35,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:35,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981293112] [2021-11-07 01:09:35,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981293112] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:35,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:35,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-07 01:09:35,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675457385] [2021-11-07 01:09:35,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:09:35,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:35,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:09:35,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:09:35,535 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:35,981 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2021-11-07 01:09:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:09:35,982 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:09:35,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:35,983 INFO L225 Difference]: With dead ends: 84 [2021-11-07 01:09:35,983 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 01:09:35,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:09:35,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 01:09:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-07 01:09:35,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:35,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2021-11-07 01:09:35,999 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 45 [2021-11-07 01:09:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:35,999 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2021-11-07 01:09:35,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:35,999 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2021-11-07 01:09:36,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:09:36,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:36,000 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:36,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:36,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:36,201 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:09:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:36,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1086436113, now seen corresponding path program 1 times [2021-11-07 01:09:36,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:36,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137369773] [2021-11-07 01:09:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:36,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:36,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:36,204 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:36,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:09:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:37,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:09:37,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:09:37,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:40,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:09:40,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2021-11-07 01:09:40,750 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-07 01:09:40,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-11-07 01:09:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:09:40,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:40,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137369773] [2021-11-07 01:09:40,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137369773] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:40,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:40,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-07 01:09:40,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910909678] [2021-11-07 01:09:40,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:09:40,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:40,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:09:40,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:09:40,886 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:41,391 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2021-11-07 01:09:41,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:09:41,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:09:41,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:41,394 INFO L225 Difference]: With dead ends: 107 [2021-11-07 01:09:41,394 INFO L226 Difference]: Without dead ends: 77 [2021-11-07 01:09:41,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:09:41,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-07 01:09:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-07 01:09:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:41,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2021-11-07 01:09:41,406 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 45 [2021-11-07 01:09:41,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:41,406 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2021-11-07 01:09:41,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2021-11-07 01:09:41,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:09:41,407 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:41,407 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:41,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:41,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:41,608 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:09:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:41,608 INFO L85 PathProgramCache]: Analyzing trace with hash -406377743, now seen corresponding path program 1 times [2021-11-07 01:09:41,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:41,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287257066] [2021-11-07 01:09:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:41,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:41,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:41,610 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:41,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:09:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:42,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 01:09:42,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:43,020 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 41 treesize of output 29 [2021-11-07 01:09:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:43,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:43,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:09:43,266 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 17 treesize of output 20 [2021-11-07 01:09:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:43,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:43,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287257066] [2021-11-07 01:09:43,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287257066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:09:43,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [856389909] [2021-11-07 01:09:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:43,555 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:09:43,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:09:43,557 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:09:43,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:09:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:44,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 01:09:44,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:44,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:44,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:44,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:44,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:44,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:44,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:44,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-07 01:09:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:46,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:48,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:09:48,121 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 8037 treesize of output 7979 [2021-11-07 01:09:48,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:48,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:48,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:49,169 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 6 treesize of output 4 [2021-11-07 01:09:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:49,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [856389909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:09:49,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107912445] [2021-11-07 01:09:49,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:49,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:09:49,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:09:49,608 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:09:49,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 01:09:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:50,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 01:09:50,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:50,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:50,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:50,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:50,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:50,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:50,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:50,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-07 01:09:53,715 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 01:09:53,716 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 68 treesize of output 38 [2021-11-07 01:09:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:53,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:54,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:09:54,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8437 treesize of output 8379 [2021-11-07 01:09:54,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:54,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:54,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:55,180 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-07 01:09:55,310 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-07 01:09:55,336 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 6 treesize of output 4 [2021-11-07 01:09:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:55,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107912445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:09:55,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:09:55,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 39 [2021-11-07 01:09:55,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800572601] [2021-11-07 01:09:55,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 01:09:55,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:55,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 01:09:55,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 01:09:55,946 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 39 states, 39 states have (on average 4.82051282051282) internal successors, (188), 39 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:57,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:57,380 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2021-11-07 01:09:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:09:57,381 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.82051282051282) internal successors, (188), 39 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:09:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:57,381 INFO L225 Difference]: With dead ends: 102 [2021-11-07 01:09:57,382 INFO L226 Difference]: Without dead ends: 58 [2021-11-07 01:09:57,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 01:09:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-07 01:09:57,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-07 01:09:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-11-07 01:09:57,399 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 45 [2021-11-07 01:09:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:57,399 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-11-07 01:09:57,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.82051282051282) internal successors, (188), 39 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:57,401 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-11-07 01:09:57,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:09:57,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:57,402 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:57,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-07 01:09:57,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:57,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:58,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:09:58,008 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:09:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:58,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1997233278, now seen corresponding path program 1 times [2021-11-07 01:09:58,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:58,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076959107] [2021-11-07 01:09:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:58,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:58,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:58,010 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:58,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:09:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:59,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 01:09:59,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:01,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:08,007 INFO L354 Elim1Store]: treesize reduction 21, result has 86.8 percent of original size [2021-11-07 01:10:08,007 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 185 [2021-11-07 01:10:08,525 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-07 01:10:08,525 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 191 [2021-11-07 01:10:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:11,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:11,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076959107] [2021-11-07 01:10:11,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076959107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:10:11,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1423542490] [2021-11-07 01:10:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:11,592 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:11,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:10:11,596 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:10:11,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7723e0a-56e5-4ec5-8eb6-9d167e525680/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:10:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:13,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 01:10:13,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:13,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:13,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:13,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:13,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:13,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:13,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-07 01:10:13,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:13,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:13,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:13,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:13,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:13,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:13,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-07 01:10:18,334 INFO L354 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2021-11-07 01:10:18,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 134 treesize of output 88 [2021-11-07 01:10:18,354 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-07 01:10:18,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 34 [2021-11-07 01:10:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:18,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:20,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:10:20,928 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 1538223 treesize of output 1525539 [2021-11-07 01:12:24,831 WARN L207 SmtUtils]: Spent 2.07 m on a formula simplification. DAG size of input: 756 DAG size of output: 719 [2021-11-07 01:12:30,249 WARN L207 SmtUtils]: Spent 5.41 s on a formula simplification that was a NOOP. DAG size: 715 [2021-11-07 01:12:30,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:12:30,780 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 899453304 treesize of output 891157036