./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P --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 4074842a6d6900f214884b5b0ef94aa1b36f37c81b70cefd0198f88d1e717beb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:35:31,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:35:31,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:35:31,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:35:31,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:35:31,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:35:31,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:35:31,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:35:31,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:35:31,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:35:31,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:35:31,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:35:31,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:35:31,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:35:31,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:35:31,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:35:31,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:35:31,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:35:31,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:35:31,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:35:31,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:35:31,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:35:31,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:35:31,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:35:31,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:35:31,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:35:31,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:35:31,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:35:31,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:35:31,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:35:31,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:35:31,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:35:31,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:35:31,699 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:35:31,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:35:31,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:35:31,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:35:31,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:35:31,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:35:31,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:35:31,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:35:31,705 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:35:31,745 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:35:31,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:35:31,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:35:31,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:35:31,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:35:31,754 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:35:31,754 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:35:31,754 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:35:31,755 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:35:31,755 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:35:31,756 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:35:31,756 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:35:31,756 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:35:31,757 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:35:31,757 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:35:31,757 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:35:31,757 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:35:31,757 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:35:31,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:35:31,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:35:31,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:35:31,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:35:31,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:35:31,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:35:31,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:35:31,760 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:35:31,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:35:31,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:35:31,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:35:31,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:35:31,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:35:31,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:35:31,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:35:31,764 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:35:31,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:35:31,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:35:31,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:35:31,764 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:35:31,765 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_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4074842a6d6900f214884b5b0ef94aa1b36f37c81b70cefd0198f88d1e717beb [2021-11-20 23:35:31,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:35:32,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:35:32,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:35:32,014 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:35:32,015 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:35:32,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i [2021-11-20 23:35:32,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/data/c70ec3a36/4404d3a5d70a497d92a5c9946716b397/FLAG3160f3a59 [2021-11-20 23:35:32,968 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:35:32,969 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i [2021-11-20 23:35:33,017 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/data/c70ec3a36/4404d3a5d70a497d92a5c9946716b397/FLAG3160f3a59 [2021-11-20 23:35:33,445 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/data/c70ec3a36/4404d3a5d70a497d92a5c9946716b397 [2021-11-20 23:35:33,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:35:33,448 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:35:33,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:35:33,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:35:33,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:35:33,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:33" (1/1) ... [2021-11-20 23:35:33,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dc8e65a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:33, skipping insertion in model container [2021-11-20 23:35:33,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:33" (1/1) ... [2021-11-20 23:35:33,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:35:33,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:35:33,927 WARN L230 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_a090c336-97e4-4658-8337-240683978f35/sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i[4495,4508] [2021-11-20 23:35:33,935 WARN L230 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_a090c336-97e4-4658-8337-240683978f35/sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i[4555,4568] [2021-11-20 23:35:34,793 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 23:35:34,865 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,866 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,866 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,867 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,868 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,891 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,904 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,906 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,906 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,908 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,910 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,910 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,911 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,294 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:35:35,295 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:35:35,296 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:35:35,298 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:35:35,299 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:35:35,300 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:35:35,300 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:35:35,301 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:35:35,302 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:35:35,302 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:35:35,454 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,461 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,520 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,521 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:35:35,570 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:35:35,598 WARN L230 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_a090c336-97e4-4658-8337-240683978f35/sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i[4495,4508] [2021-11-20 23:35:35,599 WARN L230 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_a090c336-97e4-4658-8337-240683978f35/sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i[4555,4568] [2021-11-20 23:35:35,672 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 23:35:35,699 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,700 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,706 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,706 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,707 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,716 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,716 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,717 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,718 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,719 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,719 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,720 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,720 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,765 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:35:35,771 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:35:35,772 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:35:35,773 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:35:35,775 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:35:35,777 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:35:35,777 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:35:35,778 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:35:35,778 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:35:35,779 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:35:35,834 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,842 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,916 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,922 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:35,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:35:36,209 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:35:36,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:36 WrapperNode [2021-11-20 23:35:36,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:35:36,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:35:36,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:35:36,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:35:36,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:36" (1/1) ... [2021-11-20 23:35:36,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:36" (1/1) ... [2021-11-20 23:35:36,406 INFO L137 Inliner]: procedures = 691, calls = 1682, calls flagged for inlining = 53, calls inlined = 9, statements flattened = 655 [2021-11-20 23:35:36,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:35:36,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:35:36,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:35:36,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:35:36,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:36" (1/1) ... [2021-11-20 23:35:36,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:36" (1/1) ... [2021-11-20 23:35:36,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:36" (1/1) ... [2021-11-20 23:35:36,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:36" (1/1) ... [2021-11-20 23:35:36,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:36" (1/1) ... [2021-11-20 23:35:36,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:36" (1/1) ... [2021-11-20 23:35:36,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:36" (1/1) ... [2021-11-20 23:35:36,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:35:36,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:35:36,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:35:36,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:35:36,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:36" (1/1) ... [2021-11-20 23:35:36,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:35:36,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:36,583 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:35:36,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:35:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:35:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-11-20 23:35:36,640 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-11-20 23:35:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-20 23:35:36,640 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-20 23:35:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 23:35:36,640 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 23:35:36,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:35:36,641 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-20 23:35:36,641 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-20 23:35:36,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:35:36,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:35:36,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:35:36,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:35:36,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:35:36,643 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-11-20 23:35:36,643 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-11-20 23:35:36,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:35:36,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:35:36,644 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 23:35:36,644 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 23:35:36,644 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-20 23:35:36,644 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-20 23:35:36,644 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-20 23:35:36,644 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-20 23:35:36,645 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-20 23:35:36,645 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-20 23:35:36,645 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2021-11-20 23:35:36,645 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2021-11-20 23:35:36,645 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:35:36,645 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:35:36,647 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-11-20 23:35:36,647 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-11-20 23:35:36,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:35:36,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:35:36,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:35:36,647 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-20 23:35:36,647 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-20 23:35:36,648 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-20 23:35:36,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-20 23:35:36,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:35:36,648 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-11-20 23:35:36,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-11-20 23:35:36,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:35:37,056 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:35:37,058 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:35:38,343 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:35:38,484 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:35:38,484 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:35:38,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:38 BoogieIcfgContainer [2021-11-20 23:35:38,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:35:38,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:35:38,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:35:38,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:35:38,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:35:33" (1/3) ... [2021-11-20 23:35:38,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605e7d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:38, skipping insertion in model container [2021-11-20 23:35:38,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:36" (2/3) ... [2021-11-20 23:35:38,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605e7d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:38, skipping insertion in model container [2021-11-20 23:35:38,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:38" (3/3) ... [2021-11-20 23:35:38,501 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_get_at_harness.i [2021-11-20 23:35:38,507 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:35:38,507 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:35:38,569 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:35:38,586 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 [2021-11-20 23:35:38,587 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:35:38,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 78 states have internal predecessors, (91), 52 states have call successors, (52), 16 states have call predecessors, (52), 16 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-20 23:35:38,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 23:35:38,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:38,632 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:38,632 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:38,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:38,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1567106202, now seen corresponding path program 1 times [2021-11-20 23:35:38,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:38,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205860349] [2021-11-20 23:35:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:38,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-20 23:35:39,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:39,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205860349] [2021-11-20 23:35:39,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205860349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:35:39,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069165305] [2021-11-20 23:35:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:39,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:39,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:39,350 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:35:39,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:35:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:39,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 2194 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:35:39,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 23:35:40,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:35:40,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069165305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:40,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:35:40,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-20 23:35:40,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827218876] [2021-11-20 23:35:40,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:40,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:35:40,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:40,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:35:40,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:35:40,281 INFO L87 Difference]: Start difference. First operand has 147 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 78 states have internal predecessors, (91), 52 states have call successors, (52), 16 states have call predecessors, (52), 16 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-20 23:35:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:40,763 INFO L93 Difference]: Finished difference Result 271 states and 380 transitions. [2021-11-20 23:35:40,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:35:40,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 95 [2021-11-20 23:35:40,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:40,777 INFO L225 Difference]: With dead ends: 271 [2021-11-20 23:35:40,777 INFO L226 Difference]: Without dead ends: 143 [2021-11-20 23:35:40,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:35:40,785 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 38 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:40,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 557 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:35:40,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-20 23:35:40,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-11-20 23:35:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 74 states have (on average 1.135135135135135) internal successors, (84), 76 states have internal predecessors, (84), 52 states have call successors, (52), 16 states have call predecessors, (52), 16 states have return successors, (55), 50 states have call predecessors, (55), 50 states have call successors, (55) [2021-11-20 23:35:40,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 191 transitions. [2021-11-20 23:35:40,844 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 191 transitions. Word has length 95 [2021-11-20 23:35:40,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:40,844 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 191 transitions. [2021-11-20 23:35:40,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-20 23:35:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 191 transitions. [2021-11-20 23:35:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 23:35:40,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:40,851 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:40,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 23:35:41,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:41,068 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:41,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:41,068 INFO L85 PathProgramCache]: Analyzing trace with hash 23579164, now seen corresponding path program 1 times [2021-11-20 23:35:41,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:41,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235718276] [2021-11-20 23:35:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:41,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:41,165 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:35:41,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069253689] [2021-11-20 23:35:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:41,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:41,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:41,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:35:41,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:35:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:41,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 2414 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:35:41,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-20 23:35:41,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:35:41,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:41,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235718276] [2021-11-20 23:35:41,957 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:35:41,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069253689] [2021-11-20 23:35:41,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069253689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:41,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:41,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:35:41,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191552164] [2021-11-20 23:35:41,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:41,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:35:41,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:41,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:35:41,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:35:41,961 INFO L87 Difference]: Start difference. First operand 143 states and 191 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-20 23:35:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:42,514 INFO L93 Difference]: Finished difference Result 232 states and 309 transitions. [2021-11-20 23:35:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:35:42,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 113 [2021-11-20 23:35:42,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:42,522 INFO L225 Difference]: With dead ends: 232 [2021-11-20 23:35:42,522 INFO L226 Difference]: Without dead ends: 143 [2021-11-20 23:35:42,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:35:42,531 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 50 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:42,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 643 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:35:42,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-20 23:35:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-11-20 23:35:42,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 74 states have (on average 1.135135135135135) internal successors, (84), 76 states have internal predecessors, (84), 52 states have call successors, (52), 16 states have call predecessors, (52), 16 states have return successors, (52), 50 states have call predecessors, (52), 50 states have call successors, (52) [2021-11-20 23:35:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 188 transitions. [2021-11-20 23:35:42,563 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 188 transitions. Word has length 113 [2021-11-20 23:35:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:42,565 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 188 transitions. [2021-11-20 23:35:42,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-20 23:35:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 188 transitions. [2021-11-20 23:35:42,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 23:35:42,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:42,576 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:42,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:35:42,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:42,808 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:42,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:42,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1573107243, now seen corresponding path program 2 times [2021-11-20 23:35:42,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:42,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515286621] [2021-11-20 23:35:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:42,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:42,872 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:35:42,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960876970] [2021-11-20 23:35:42,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:35:42,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:42,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:42,874 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:35:42,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:35:43,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 23:35:43,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:35:43,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:35:43,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-20 23:35:43,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:35:43,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:43,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515286621] [2021-11-20 23:35:43,586 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:35:43,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960876970] [2021-11-20 23:35:43,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960876970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:43,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:43,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:35:43,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643644225] [2021-11-20 23:35:43,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:43,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:35:43,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:43,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:35:43,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:35:43,590 INFO L87 Difference]: Start difference. First operand 143 states and 188 transitions. Second operand has 5 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-20 23:35:43,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:43,943 INFO L93 Difference]: Finished difference Result 223 states and 290 transitions. [2021-11-20 23:35:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:35:43,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 122 [2021-11-20 23:35:43,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:43,948 INFO L225 Difference]: With dead ends: 223 [2021-11-20 23:35:43,948 INFO L226 Difference]: Without dead ends: 143 [2021-11-20 23:35:43,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:35:43,950 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 0 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:43,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 583 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:35:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-20 23:35:43,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-11-20 23:35:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 74 states have (on average 1.135135135135135) internal successors, (84), 76 states have internal predecessors, (84), 52 states have call successors, (52), 16 states have call predecessors, (52), 16 states have return successors, (51), 50 states have call predecessors, (51), 50 states have call successors, (51) [2021-11-20 23:35:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2021-11-20 23:35:43,967 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 122 [2021-11-20 23:35:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:43,968 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2021-11-20 23:35:43,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-20 23:35:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2021-11-20 23:35:43,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-20 23:35:43,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:43,970 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:44,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:35:44,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:44,196 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:44,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:44,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1564050084, now seen corresponding path program 3 times [2021-11-20 23:35:44,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:44,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273741874] [2021-11-20 23:35:44,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:44,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:44,255 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:35:44,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899744046] [2021-11-20 23:35:44,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:35:44,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:44,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:44,257 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:35:44,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:35:44,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:35:44,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:35:44,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:35:44,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-20 23:35:45,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:35:45,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:45,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273741874] [2021-11-20 23:35:45,083 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:35:45,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899744046] [2021-11-20 23:35:45,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899744046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:45,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:45,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 23:35:45,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027947805] [2021-11-20 23:35:45,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:45,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:35:45,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:45,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:35:45,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:35:45,088 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-20 23:35:45,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:45,562 INFO L93 Difference]: Finished difference Result 220 states and 283 transitions. [2021-11-20 23:35:45,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:35:45,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) Word has length 131 [2021-11-20 23:35:45,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:45,565 INFO L225 Difference]: With dead ends: 220 [2021-11-20 23:35:45,565 INFO L226 Difference]: Without dead ends: 141 [2021-11-20 23:35:45,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:35:45,567 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 53 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:45,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 918 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:35:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-20 23:35:45,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-20 23:35:45,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 74 states have internal predecessors, (82), 52 states have call successors, (52), 16 states have call predecessors, (52), 15 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-20 23:35:45,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 184 transitions. [2021-11-20 23:35:45,584 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 184 transitions. Word has length 131 [2021-11-20 23:35:45,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:45,584 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 184 transitions. [2021-11-20 23:35:45,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-20 23:35:45,585 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 184 transitions. [2021-11-20 23:35:45,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 23:35:45,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:45,587 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:45,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:35:45,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-20 23:35:45,815 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:45,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:45,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1367744773, now seen corresponding path program 1 times [2021-11-20 23:35:45,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:45,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925402502] [2021-11-20 23:35:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:45,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:45,889 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:35:45,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383215891] [2021-11-20 23:35:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:45,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:45,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:45,891 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:35:45,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a090c336-97e4-4658-8337-240683978f35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:35:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:46,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 2744 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-20 23:35:46,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 117 proven. 6 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-20 23:35:46,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:35:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-11-20 23:35:47,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:47,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925402502] [2021-11-20 23:35:47,655 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:35:47,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383215891] [2021-11-20 23:35:47,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383215891] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:35:47,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2111900100] [2021-11-20 23:35:47,688 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2021-11-20 23:35:47,688 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:35:47,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:35:47,699 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:35:47,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:35:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:35:52,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:35:53,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:35:53,063 INFO L244 Elim1Store]: Index analysis took 395 ms [2021-11-20 23:36:30,304 WARN L227 SmtUtils]: Spent 37.15s on a formula simplification. DAG size of input: 2139 DAG size of output: 1167 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:36:30,309 INFO L354 Elim1Store]: treesize reduction 3492, result has 33.3 percent of original size [2021-11-20 23:36:30,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 199 select indices, 199 select index equivalence classes, 19507 disjoint index pairs (out of 19701 index pairs), introduced 199 new quantified variables, introduced 388 case distinctions, treesize of input 1002 treesize of output 2369 [2021-11-20 23:36:50,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:50,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:50,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:50,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 197 select indices, 197 select index equivalence classes, 19504 disjoint index pairs (out of 19306 index pairs), introduced 197 new quantified variables, introduced 0 case distinctions, treesize of input 992 treesize of output 1582