./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:47:19,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:47:19,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:47:19,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:47:19,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:47:19,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:47:19,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:47:19,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:47:19,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:47:19,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:47:19,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:47:19,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:47:19,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:47:19,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:47:19,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:47:19,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:47:19,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:47:19,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:47:19,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:47:19,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:47:19,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:47:19,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:47:19,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:47:19,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:47:19,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:47:19,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:47:19,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:47:19,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:47:19,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:47:19,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:47:19,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:47:19,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:47:19,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:47:19,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:47:19,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:47:19,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:47:19,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:47:19,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:47:19,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:47:19,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:47:19,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:47:19,633 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:47:19,677 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:47:19,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:47:19,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:47:19,679 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:47:19,679 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:47:19,679 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:47:19,680 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:47:19,680 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:47:19,680 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:47:19,680 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:47:19,691 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:47:19,691 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:47:19,691 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:47:19,691 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:47:19,692 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:47:19,692 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:47:19,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:47:19,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:47:19,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:47:19,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:47:19,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:47:19,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:47:19,693 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:47:19,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:47:19,693 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:47:19,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:47:19,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:47:19,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:47:19,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:47:19,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:47:19,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:47:19,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:47:19,695 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:47:19,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:47:19,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:47:19,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:47:19,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:47:19,696 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_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 [2021-11-12 23:47:19,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:47:20,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:47:20,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:47:20,011 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:47:20,012 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:47:20,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-11-12 23:47:20,083 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/data/107e0c7cb/5159f02475214abf9775205e1bdd1757/FLAGfeba5a729 [2021-11-12 23:47:20,933 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:47:20,933 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-11-12 23:47:20,977 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/data/107e0c7cb/5159f02475214abf9775205e1bdd1757/FLAGfeba5a729 [2021-11-12 23:47:21,411 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/data/107e0c7cb/5159f02475214abf9775205e1bdd1757 [2021-11-12 23:47:21,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:47:21,416 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:47:21,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:47:21,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:47:21,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:47:21,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:47:21" (1/1) ... [2021-11-12 23:47:21,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5666a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:21, skipping insertion in model container [2021-11-12 23:47:21,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:47:21" (1/1) ... [2021-11-12 23:47:21,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:47:21,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:47:21,816 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_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2021-11-12 23:47:21,822 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_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2021-11-12 23:47:21,843 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:47:21,848 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:47:22,873 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:22,874 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:22,874 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:22,875 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:22,876 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:22,890 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:22,891 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:22,893 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:22,894 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:22,896 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:22,897 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:22,898 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:22,899 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:23,245 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:47:23,246 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:47:23,247 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:47:23,249 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:47:23,250 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:47:23,250 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:47:23,251 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:47:23,252 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:47:23,252 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:47:23,253 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:47:23,389 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:47:23,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:47:23,432 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:47:23,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@215ed9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:23, skipping insertion in model container [2021-11-12 23:47:23,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:47:23,433 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:47:23,435 INFO L158 Benchmark]: Toolchain (without parser) took 2018.41ms. Allocated memory is still 125.8MB. Free memory was 85.9MB in the beginning and 69.9MB in the end (delta: 16.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-12 23:47:23,436 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 83.9MB. Free memory was 44.2MB in the beginning and 44.2MB in the end (delta: 40.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:47:23,437 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2005.33ms. Allocated memory is still 125.8MB. Free memory was 85.9MB in the beginning and 69.9MB in the end (delta: 16.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-12 23:47:23,439 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 83.9MB. Free memory was 44.2MB in the beginning and 44.2MB in the end (delta: 40.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2005.33ms. Allocated memory is still 125.8MB. Free memory was 85.9MB in the beginning and 69.9MB in the end (delta: 16.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7039]: 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_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:47:25,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:47:25,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:47:25,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:47:25,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:47:25,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:47:25,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:47:25,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:47:25,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:47:25,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:47:25,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:47:25,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:47:25,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:47:25,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:47:25,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:47:25,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:47:25,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:47:25,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:47:25,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:47:25,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:47:25,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:47:25,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:47:25,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:47:25,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:47:25,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:47:25,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:47:25,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:47:25,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:47:25,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:47:25,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:47:25,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:47:25,708 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:47:25,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:47:25,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:47:25,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:47:25,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:47:25,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:47:25,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:47:25,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:47:25,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:47:25,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:47:25,729 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:47:25,777 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:47:25,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:47:25,779 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:47:25,779 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:47:25,779 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:47:25,780 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:47:25,780 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:47:25,780 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:47:25,780 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:47:25,780 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:47:25,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:47:25,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:47:25,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:47:25,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:47:25,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:47:25,784 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:47:25,784 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:47:25,784 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:47:25,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:47:25,785 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:47:25,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:47:25,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:47:25,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:47:25,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:47:25,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:47:25,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:47:25,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:47:25,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:47:25,787 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:47:25,787 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:25,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:47:25,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:47:25,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:47:25,788 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_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 [2021-11-12 23:47:26,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:47:26,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:47:26,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:47:26,178 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:47:26,178 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:47:26,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-11-12 23:47:26,261 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/data/5d1404b54/20a51f6a87a44115a8a564226b1f6b79/FLAGa7fc158f9 [2021-11-12 23:47:27,183 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:47:27,184 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-11-12 23:47:27,221 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/data/5d1404b54/20a51f6a87a44115a8a564226b1f6b79/FLAGa7fc158f9 [2021-11-12 23:47:27,687 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/data/5d1404b54/20a51f6a87a44115a8a564226b1f6b79 [2021-11-12 23:47:27,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:47:27,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:47:27,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:47:27,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:47:27,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:47:27,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:47:27" (1/1) ... [2021-11-12 23:47:27,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b8e495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:27, skipping insertion in model container [2021-11-12 23:47:27,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:47:27" (1/1) ... [2021-11-12 23:47:27,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:47:27,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:47:28,184 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_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2021-11-12 23:47:28,191 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_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2021-11-12 23:47:28,214 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:47:28,221 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:47:29,221 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:29,223 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:29,223 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:29,224 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:29,226 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:29,255 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:29,256 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:29,260 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:29,261 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:29,263 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:29,264 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:29,265 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:29,265 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:29,677 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:47:29,679 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:47:29,680 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:47:29,682 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:47:29,683 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:47:29,684 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:47:29,685 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:47:29,686 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:47:29,700 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:47:29,702 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:47:29,836 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:47:29,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:47:29,895 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:47:29,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:47:29,953 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_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2021-11-12 23:47:29,956 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_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2021-11-12 23:47:29,958 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:47:29,958 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:47:30,003 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,004 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,004 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,005 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,006 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,014 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,014 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,019 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,021 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,023 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,024 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,024 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,025 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,070 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:47:30,071 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:47:30,072 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:47:30,073 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:47:30,073 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:47:30,074 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:47:30,074 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:47:30,075 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:47:30,075 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:47:30,076 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:47:30,107 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:47:30,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:47:30,149 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:47:30,172 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_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2021-11-12 23:47:30,179 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_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2021-11-12 23:47:30,180 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-12 23:47:30,189 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-12 23:47:30,236 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,237 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,238 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,238 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,239 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,252 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,252 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,255 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,258 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,259 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,260 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,260 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,261 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-12 23:47:30,304 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-12 23:47:30,305 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-12 23:47:30,306 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-12 23:47:30,306 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-12 23:47:30,307 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-12 23:47:30,308 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-12 23:47:30,309 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-12 23:47:30,309 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-12 23:47:30,310 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-12 23:47:30,310 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-12 23:47:30,347 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-12 23:47:30,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:47:30,633 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:47:30,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:30 WrapperNode [2021-11-12 23:47:30,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:47:30,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:47:30,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:47:30,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:47:30,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:30" (1/1) ... [2021-11-12 23:47:30,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:30" (1/1) ... [2021-11-12 23:47:30,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:47:30,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:47:30,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:47:30,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:47:30,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:30" (1/1) ... [2021-11-12 23:47:30,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:30" (1/1) ... [2021-11-12 23:47:30,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:30" (1/1) ... [2021-11-12 23:47:30,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:30" (1/1) ... [2021-11-12 23:47:30,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:30" (1/1) ... [2021-11-12 23:47:30,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:30" (1/1) ... [2021-11-12 23:47:30,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:30" (1/1) ... [2021-11-12 23:47:30,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:47:30,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:47:30,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:47:30,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:47:30,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:30" (1/1) ... [2021-11-12 23:47:30,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:47:30,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:30,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:47:30,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:47:30,976 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-12 23:47:30,976 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-12 23:47:30,977 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-11-12 23:47:30,977 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-11-12 23:47:30,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:47:30,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:47:30,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:47:30,978 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:47:30,978 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-12 23:47:30,978 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-12 23:47:30,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:47:30,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:47:30,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:47:30,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:47:30,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:47:30,979 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:47:30,979 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:47:30,979 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:47:30,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:47:30,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:47:30,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:47:30,980 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-12 23:47:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-12 23:47:31,736 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:47:31,736 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-12 23:47:31,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:47:31 BoogieIcfgContainer [2021-11-12 23:47:31,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:47:31,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:47:31,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:47:31,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:47:31,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:47:27" (1/3) ... [2021-11-12 23:47:31,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52480da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:47:31, skipping insertion in model container [2021-11-12 23:47:31,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:30" (2/3) ... [2021-11-12 23:47:31,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52480da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:47:31, skipping insertion in model container [2021-11-12 23:47:31,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:47:31" (3/3) ... [2021-11-12 23:47:31,747 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2021-11-12 23:47:31,753 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:47:31,753 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:47:31,802 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:47:31,808 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:47:31,808 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:47:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-12 23:47:31,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 23:47:31,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:31,832 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:31,833 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:31,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1155526354, now seen corresponding path program 1 times [2021-11-12 23:47:31,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:31,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058703166] [2021-11-12 23:47:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:31,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:31,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:31,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:31,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:47:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:32,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:47:32,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:32,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:32,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:32,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058703166] [2021-11-12 23:47:32,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058703166] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:32,365 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:32,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:47:32,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362376163] [2021-11-12 23:47:32,367 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:32,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:47:32,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:32,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:47:32,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:47:32,402 INFO L87 Difference]: Start difference. First operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-12 23:47:32,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:32,431 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2021-11-12 23:47:32,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:47:32,433 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 48 [2021-11-12 23:47:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:32,442 INFO L225 Difference]: With dead ends: 142 [2021-11-12 23:47:32,442 INFO L226 Difference]: Without dead ends: 69 [2021-11-12 23:47:32,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:47:32,449 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.39ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:32,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 1.39ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:47:32,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-12 23:47:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-12 23:47:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:47:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2021-11-12 23:47:32,495 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 48 [2021-11-12 23:47:32,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:32,497 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2021-11-12 23:47:32,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-12 23:47:32,497 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2021-11-12 23:47:32,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-12 23:47:32,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:32,500 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:32,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 23:47:32,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:32,715 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:32,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1718448822, now seen corresponding path program 1 times [2021-11-12 23:47:32,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:32,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917722036] [2021-11-12 23:47:32,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:32,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:32,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:32,720 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:32,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:47:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:32,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:47:32,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:33,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:33,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:33,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917722036] [2021-11-12 23:47:33,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917722036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:33,469 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:33,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-12 23:47:33,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088534648] [2021-11-12 23:47:33,471 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:33,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:47:33,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:33,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:47:33,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:47:33,474 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 7 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:47:33,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:33,707 INFO L93 Difference]: Finished difference Result 138 states and 173 transitions. [2021-11-12 23:47:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:47:33,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 54 [2021-11-12 23:47:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:33,713 INFO L225 Difference]: With dead ends: 138 [2021-11-12 23:47:33,714 INFO L226 Difference]: Without dead ends: 74 [2021-11-12 23:47:33,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:47:33,718 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 32 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.07ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 183.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:33,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 334 Invalid, 60 Unknown, 0 Unchecked, 9.07ms Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 183.50ms Time] [2021-11-12 23:47:33,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-12 23:47:33,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-12 23:47:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 50 states have internal predecessors, (58), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2021-11-12 23:47:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2021-11-12 23:47:33,743 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 54 [2021-11-12 23:47:33,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:33,743 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2021-11-12 23:47:33,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:47:33,743 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2021-11-12 23:47:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-12 23:47:33,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:33,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:33,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:33,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:33,962 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:33,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:33,962 INFO L85 PathProgramCache]: Analyzing trace with hash 637356428, now seen corresponding path program 1 times [2021-11-12 23:47:33,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:33,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254386547] [2021-11-12 23:47:33,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:33,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:33,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:33,964 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:33,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:47:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:34,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:47:34,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:34,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:34,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:34,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254386547] [2021-11-12 23:47:34,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254386547] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:34,497 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:34,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:47:34,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929027458] [2021-11-12 23:47:34,497 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:34,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:47:34,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:34,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:47:34,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:47:34,499 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:47:34,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:34,560 INFO L93 Difference]: Finished difference Result 134 states and 167 transitions. [2021-11-12 23:47:34,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:47:34,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2021-11-12 23:47:34,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:34,563 INFO L225 Difference]: With dead ends: 134 [2021-11-12 23:47:34,563 INFO L226 Difference]: Without dead ends: 76 [2021-11-12 23:47:34,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:47:34,565 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 4 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:34,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 333 Invalid, 12 Unknown, 0 Unchecked, 2.90ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 37.10ms Time] [2021-11-12 23:47:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-12 23:47:34,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-12 23:47:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.2) internal successors, (60), 52 states have internal predecessors, (60), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2021-11-12 23:47:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2021-11-12 23:47:34,591 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 54 [2021-11-12 23:47:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:34,592 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2021-11-12 23:47:34,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:47:34,592 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2021-11-12 23:47:34,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-12 23:47:34,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:34,594 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-12 23:47:34,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 23:47:34,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:34,807 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:34,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:34,808 INFO L85 PathProgramCache]: Analyzing trace with hash -548924052, now seen corresponding path program 1 times [2021-11-12 23:47:34,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:34,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184897575] [2021-11-12 23:47:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:34,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:34,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:34,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:34,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:47:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:35,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:47:35,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:35,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:35,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:35,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184897575] [2021-11-12 23:47:35,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184897575] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:35,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [216979280] [2021-11-12 23:47:35,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:35,475 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:35,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:35,479 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:35,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-12 23:47:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:35,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:47:35,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:47:35,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:47:36,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [216979280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:36,067 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:47:36,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 18 [2021-11-12 23:47:36,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219807864] [2021-11-12 23:47:36,067 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:36,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:47:36,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:36,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:47:36,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:47:36,069 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand has 10 states, 8 states have (on average 4.625) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-12 23:47:36,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:36,203 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-11-12 23:47:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:47:36,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.625) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 56 [2021-11-12 23:47:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:36,206 INFO L225 Difference]: With dead ends: 86 [2021-11-12 23:47:36,206 INFO L226 Difference]: Without dead ends: 84 [2021-11-12 23:47:36,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:47:36,208 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 9 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.20ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:36,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 573 Invalid, 32 Unknown, 0 Unchecked, 4.20ms Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 96.36ms Time] [2021-11-12 23:47:36,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-12 23:47:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-12 23:47:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 57 states have internal predecessors, (64), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-12 23:47:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2021-11-12 23:47:36,223 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 56 [2021-11-12 23:47:36,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:36,224 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2021-11-12 23:47:36,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.625) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-12 23:47:36,224 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2021-11-12 23:47:36,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-12 23:47:36,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:36,226 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-12 23:47:36,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:36,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:36,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:36,629 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:36,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1019138147, now seen corresponding path program 1 times [2021-11-12 23:47:36,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:36,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423601778] [2021-11-12 23:47:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:36,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:36,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:36,632 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:36,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:47:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:36,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:47:36,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:36,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:37,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:37,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423601778] [2021-11-12 23:47:37,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423601778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:37,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1774592940] [2021-11-12 23:47:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:37,299 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:37,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:37,304 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:37,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 23:47:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:37,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:47:37,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:37,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:37,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1774592940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:37,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484529200] [2021-11-12 23:47:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:37,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:37,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:37,986 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:37,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 23:47:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:38,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:47:38,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:38,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:38,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484529200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:38,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:47:38,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-12 23:47:38,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031546265] [2021-11-12 23:47:38,646 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:38,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:47:38,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:38,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:47:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:47:38,648 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:47:39,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:39,117 INFO L93 Difference]: Finished difference Result 152 states and 187 transitions. [2021-11-12 23:47:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:47:39,119 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2021-11-12 23:47:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:39,120 INFO L225 Difference]: With dead ends: 152 [2021-11-12 23:47:39,121 INFO L226 Difference]: Without dead ends: 87 [2021-11-12 23:47:39,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:47:39,127 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 13 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 152.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.65ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:39,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 493 Invalid, 54 Unknown, 0 Unchecked, 3.65ms Time], IncrementalHoareTripleChecker [11 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 182.35ms Time] [2021-11-12 23:47:39,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-12 23:47:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-12 23:47:39,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 61 states have internal predecessors, (68), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-12 23:47:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2021-11-12 23:47:39,147 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 56 [2021-11-12 23:47:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:39,147 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2021-11-12 23:47:39,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:47:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2021-11-12 23:47:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:47:39,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:39,155 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:39,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:39,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:39,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:39,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:39,770 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:39,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:39,771 INFO L85 PathProgramCache]: Analyzing trace with hash 197656611, now seen corresponding path program 2 times [2021-11-12 23:47:39,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:39,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474237437] [2021-11-12 23:47:39,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:47:39,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:39,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:39,774 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:39,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:47:40,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:47:40,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:47:40,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:47:40,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:40,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:41,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:41,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474237437] [2021-11-12 23:47:41,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474237437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:41,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [12262610] [2021-11-12 23:47:41,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:47:41,191 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:41,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:41,192 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:41,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:47:42,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:47:42,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:47:42,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:47:42,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:42,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:42,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [12262610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:42,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183759069] [2021-11-12 23:47:42,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:47:42,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:42,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:42,620 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:42,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-12 23:47:42,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:47:42,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:47:42,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:47:42,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:43,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:44,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183759069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:44,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:47:44,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 26 [2021-11-12 23:47:44,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196193010] [2021-11-12 23:47:44,202 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:44,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-12 23:47:44,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:44,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-12 23:47:44,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:47:44,205 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:47:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:46,318 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2021-11-12 23:47:46,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 23:47:46,320 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2021-11-12 23:47:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:46,322 INFO L225 Difference]: With dead ends: 160 [2021-11-12 23:47:46,323 INFO L226 Difference]: Without dead ends: 95 [2021-11-12 23:47:46,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 23:47:46,326 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 58 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 422.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.69ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 488.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:46,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 903 Invalid, 170 Unknown, 0 Unchecked, 6.69ms Time], IncrementalHoareTripleChecker [46 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 488.64ms Time] [2021-11-12 23:47:46,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-12 23:47:46,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-12 23:47:46,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 69 states have internal predecessors, (76), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-12 23:47:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2021-11-12 23:47:46,342 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 60 [2021-11-12 23:47:46,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:46,343 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2021-11-12 23:47:46,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:47:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2021-11-12 23:47:46,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:47:46,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:46,346 INFO L514 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:46,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:46,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:46,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:46,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:46,967 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1223737251, now seen corresponding path program 3 times [2021-11-12 23:47:46,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:46,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221206285] [2021-11-12 23:47:46,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:47:46,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:46,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:46,971 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:46,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:47:47,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-12 23:47:47,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:47:47,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:47:47,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:48,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:47:51,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:51,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221206285] [2021-11-12 23:47:51,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221206285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:51,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1110693543] [2021-11-12 23:47:51,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:47:51,363 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:51,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:51,364 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:51,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 23:47:52,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:47:52,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810826131] [2021-11-12 23:47:52,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:47:52,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:52,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:52,170 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:52,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 1 [2021-11-12 23:47:52,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 23:52:35,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-12 23:52:35,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:52:35,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:52:35,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:52:36,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:52:37,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810826131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:37,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:52:37,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18] total 34 [2021-11-12 23:52:37,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111744592] [2021-11-12 23:52:37,164 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-12 23:52:37,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-12 23:52:37,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:37,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-12 23:52:37,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=814, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 23:52:37,167 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:52:46,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:46,962 INFO L93 Difference]: Finished difference Result 176 states and 223 transitions. [2021-11-12 23:52:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-12 23:52:46,971 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2021-11-12 23:52:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:46,973 INFO L225 Difference]: With dead ends: 176 [2021-11-12 23:52:46,973 INFO L226 Difference]: Without dead ends: 111 [2021-11-12 23:52:46,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=722, Invalid=1728, Unknown=0, NotChecked=0, Total=2450 [2021-11-12 23:52:46,977 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 150 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 954.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.16ms SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1076.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:46,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1544 Invalid, 413 Unknown, 0 Unchecked, 8.16ms Time], IncrementalHoareTripleChecker [149 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 1076.29ms Time] [2021-11-12 23:52:46,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-12 23:52:46,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-11-12 23:52:46,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 85 states have internal predecessors, (93), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-11-12 23:52:46,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2021-11-12 23:52:46,992 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 68 [2021-11-12 23:52:46,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:46,992 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2021-11-12 23:52:46,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:52:46,993 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2021-11-12 23:52:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 23:52:46,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:46,994 INFO L514 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:47,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:47,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:47,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:47,408 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:47,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:47,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1778826365, now seen corresponding path program 4 times [2021-11-12 23:52:47,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:47,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375208200] [2021-11-12 23:52:47,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:52:47,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:47,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:47,409 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:47,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:52:47,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:52:47,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:52:47,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-12 23:52:47,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:48,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-12 23:52:48,123 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-11-12 23:52:48,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:52:48,255 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-12 23:52:48,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-11-12 23:52:48,443 INFO L354 Elim1Store]: treesize reduction 118, result has 18.6 percent of original size [2021-11-12 23:52:48,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-12 23:52:48,793 INFO L354 Elim1Store]: treesize reduction 168, result has 17.2 percent of original size [2021-11-12 23:52:48,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 61 [2021-11-12 23:52:49,195 INFO L354 Elim1Store]: treesize reduction 241, result has 15.4 percent of original size [2021-11-12 23:52:49,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 74 [2021-11-12 23:52:49,684 INFO L354 Elim1Store]: treesize reduction 338, result has 13.6 percent of original size [2021-11-12 23:52:49,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 88 [2021-11-12 23:52:50,322 INFO L354 Elim1Store]: treesize reduction 446, result has 12.4 percent of original size [2021-11-12 23:52:50,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2021-11-12 23:52:51,184 INFO L354 Elim1Store]: treesize reduction 568, result has 11.4 percent of original size [2021-11-12 23:52:51,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 116 [2021-11-12 23:52:52,097 INFO L354 Elim1Store]: treesize reduction 653, result has 10.9 percent of original size [2021-11-12 23:52:52,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 103 treesize of output 126 [2021-11-12 23:52:53,220 INFO L354 Elim1Store]: treesize reduction 806, result has 9.9 percent of original size [2021-11-12 23:52:53,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 114 treesize of output 140 [2021-11-12 23:52:54,746 INFO L354 Elim1Store]: treesize reduction 931, result has 9.5 percent of original size [2021-11-12 23:52:54,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 123 treesize of output 152 [2021-11-12 23:52:56,483 INFO L354 Elim1Store]: treesize reduction 1088, result has 9.0 percent of original size [2021-11-12 23:52:56,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 133 treesize of output 165 [2021-11-12 23:52:58,458 INFO L354 Elim1Store]: treesize reduction 1257, result has 8.4 percent of original size [2021-11-12 23:52:58,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 143 treesize of output 178 [2021-11-12 23:53:00,669 INFO L354 Elim1Store]: treesize reduction 1438, result has 8.0 percent of original size [2021-11-12 23:53:00,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 153 treesize of output 191 [2021-11-12 23:53:03,254 INFO L354 Elim1Store]: treesize reduction 1631, result has 7.6 percent of original size [2021-11-12 23:53:03,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 120 case distinctions, treesize of input 163 treesize of output 204 [2021-11-12 23:53:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:53:08,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:55:21,412 WARN L227 SmtUtils]: Spent 2.19m on a formula simplification that was a NOOP. DAG size: 151 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-12 23:55:21,758 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 85 treesize of output 83 [2021-11-12 23:56:11,441 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 118 treesize of output 116 [2021-11-12 23:56:11,454 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 1309681 treesize of output 1309679 [2021-11-12 23:56:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 120 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:56:33,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:56:33,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375208200] [2021-11-12 23:56:33,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375208200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:56:33,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [335392895] [2021-11-12 23:56:33,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:56:33,563 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:56:33,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:56:33,576 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:56:33,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:56:34,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:56:34,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:56:34,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-12 23:56:34,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:56:34,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-12 23:56:34,541 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-11-12 23:56:34,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:56:34,651 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-12 23:56:34,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-11-12 23:56:34,776 INFO L354 Elim1Store]: treesize reduction 118, result has 18.6 percent of original size [2021-11-12 23:56:34,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-12 23:56:34,954 INFO L354 Elim1Store]: treesize reduction 188, result has 16.4 percent of original size [2021-11-12 23:56:34,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 64 [2021-11-12 23:56:35,371 INFO L354 Elim1Store]: treesize reduction 241, result has 15.4 percent of original size [2021-11-12 23:56:35,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 74 [2021-11-12 23:56:35,704 INFO L354 Elim1Store]: treesize reduction 326, result has 14.0 percent of original size [2021-11-12 23:56:35,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 87 [2021-11-12 23:56:36,342 INFO L354 Elim1Store]: treesize reduction 423, result has 12.8 percent of original size [2021-11-12 23:56:36,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 83 treesize of output 100 [2021-11-12 23:56:37,122 INFO L354 Elim1Store]: treesize reduction 568, result has 11.4 percent of original size [2021-11-12 23:56:37,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 116 [2021-11-12 23:56:37,959 INFO L354 Elim1Store]: treesize reduction 704, result has 10.5 percent of original size [2021-11-12 23:56:37,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 107 treesize of output 130 [2021-11-12 23:56:39,139 INFO L354 Elim1Store]: treesize reduction 786, result has 10.2 percent of original size [2021-11-12 23:56:39,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 113 treesize of output 139 [2021-11-12 23:56:40,610 INFO L354 Elim1Store]: treesize reduction 966, result has 9.3 percent of original size [2021-11-12 23:56:40,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 125 treesize of output 154 [2021-11-12 23:56:42,394 INFO L354 Elim1Store]: treesize reduction 1088, result has 9.0 percent of original size [2021-11-12 23:56:42,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 133 treesize of output 165 [2021-11-12 23:56:44,208 INFO L354 Elim1Store]: treesize reduction 1283, result has 8.3 percent of original size [2021-11-12 23:56:44,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 144 treesize of output 179 [2021-11-12 23:56:46,654 INFO L354 Elim1Store]: treesize reduction 1438, result has 8.0 percent of original size [2021-11-12 23:56:46,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 153 treesize of output 191 [2021-11-12 23:56:49,147 INFO L354 Elim1Store]: treesize reduction 1631, result has 7.6 percent of original size [2021-11-12 23:56:49,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 120 case distinctions, treesize of input 163 treesize of output 204 [2021-11-12 23:56:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:56:51,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:59:05,201 WARN L227 SmtUtils]: Spent 2.22m on a formula simplification that was a NOOP. DAG size: 151 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-12 23:59:05,511 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 85 treesize of output 83 [2021-11-12 23:59:05,951 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 118 treesize of output 116 [2021-11-12 23:59:05,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1277937 treesize of output 1277935 [2021-11-12 23:59:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 120 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:59:25,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [335392895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:59:25,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926935649] [2021-11-12 23:59:25,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:59:25,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:59:25,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:59:25,960 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:59:25,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2adbad9b-eec0-4f72-a91c-f5017bcfd5f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 23:59:26,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:59:26,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:59:26,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-12 23:59:26,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:59:26,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-12 23:59:26,400 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-11-12 23:59:26,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:59:26,752 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-12 23:59:26,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-12 23:59:27,233 INFO L354 Elim1Store]: treesize reduction 107, result has 19.5 percent of original size [2021-11-12 23:59:27,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 48 [2021-11-12 23:59:27,752 INFO L354 Elim1Store]: treesize reduction 168, result has 17.2 percent of original size [2021-11-12 23:59:27,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 61 [2021-11-12 23:59:28,461 INFO L354 Elim1Store]: treesize reduction 251, result has 14.9 percent of original size [2021-11-12 23:59:28,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 75 [2021-11-12 23:59:29,308 INFO L354 Elim1Store]: treesize reduction 346, result has 13.5 percent of original size [2021-11-12 23:59:29,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-11-12 23:59:30,402 INFO L354 Elim1Store]: treesize reduction 423, result has 12.8 percent of original size [2021-11-12 23:59:30,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 83 treesize of output 100 [2021-11-12 23:59:31,487 INFO L354 Elim1Store]: treesize reduction 548, result has 11.5 percent of original size [2021-11-12 23:59:31,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 94 treesize of output 114 [2021-11-12 23:59:33,003 INFO L354 Elim1Store]: treesize reduction 653, result has 10.9 percent of original size [2021-11-12 23:59:33,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 103 treesize of output 126 [2021-11-12 23:59:34,787 INFO L354 Elim1Store]: treesize reduction 806, result has 9.9 percent of original size [2021-11-12 23:59:34,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 114 treesize of output 140 [2021-11-12 23:59:36,865 INFO L354 Elim1Store]: treesize reduction 931, result has 9.5 percent of original size [2021-11-12 23:59:36,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 123 treesize of output 152 [2021-11-12 23:59:39,004 INFO L354 Elim1Store]: treesize reduction 1112, result has 8.8 percent of original size [2021-11-12 23:59:39,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 134 treesize of output 166 [2021-11-12 23:59:41,626 INFO L354 Elim1Store]: treesize reduction 1298, result has 8.3 percent of original size [2021-11-12 23:59:41,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 145 treesize of output 180 [2021-11-12 23:59:44,498 INFO L354 Elim1Store]: treesize reduction 1498, result has 7.8 percent of original size [2021-11-12 23:59:44,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 156 treesize of output 194 [2021-11-12 23:59:47,687 INFO L354 Elim1Store]: treesize reduction 1712, result has 7.4 percent of original size [2021-11-12 23:59:47,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 120 case distinctions, treesize of input 167 treesize of output 208 [2021-11-12 23:59:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:59:52,723 INFO L328 TraceCheckSpWp]: Computing backward predicates...