./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_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_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/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_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/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_e0cee047-ab96-4401-a4fc-4bf98b728b98/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 edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:46:03,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:46:03,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:46:03,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:46:03,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:46:03,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:46:03,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:46:03,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:46:03,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:46:03,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:46:03,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:46:03,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:46:03,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:46:03,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:46:03,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:46:03,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:46:03,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:46:03,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:46:03,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:46:03,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:46:03,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:46:03,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:46:03,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:46:03,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:46:03,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:46:03,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:46:03,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:46:03,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:46:03,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:46:03,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:46:03,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:46:03,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:46:03,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:46:03,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:46:03,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:46:03,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:46:03,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:46:03,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:46:03,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:46:03,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:46:03,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:46:03,395 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 22:46:03,439 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:46:03,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:46:03,440 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:46:03,440 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:46:03,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:46:03,447 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:46:03,447 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:46:03,448 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:46:03,448 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:46:03,448 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:46:03,449 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:46:03,450 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:46:03,450 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:46:03,450 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:46:03,450 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:46:03,451 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:46:03,451 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:46:03,451 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:46:03,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:46:03,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:46:03,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:46:03,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:46:03,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:46:03,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:46:03,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:46:03,454 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:46:03,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:46:03,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:46:03,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:46:03,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:46:03,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:46:03,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:46:03,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:46:03,458 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:46:03,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:46:03,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:46:03,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:46:03,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:46:03,459 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_e0cee047-ab96-4401-a4fc-4bf98b728b98/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 [2021-11-20 22:46:03,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:46:03,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:46:03,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:46:03,781 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:46:03,781 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:46:03,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-20 22:46:03,870 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/data/5b23827a9/04192554ac5d44a6888cdf68aeb5baa2/FLAG37e256e70 [2021-11-20 22:46:04,653 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:46:04,654 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-20 22:46:04,685 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/data/5b23827a9/04192554ac5d44a6888cdf68aeb5baa2/FLAG37e256e70 [2021-11-20 22:46:04,709 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/data/5b23827a9/04192554ac5d44a6888cdf68aeb5baa2 [2021-11-20 22:46:04,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:46:04,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:46:04,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:46:04,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:46:04,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:46:04,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:46:04" (1/1) ... [2021-11-20 22:46:04,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:04, skipping insertion in model container [2021-11-20 22:46:04,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:46:04" (1/1) ... [2021-11-20 22:46:04,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:46:04,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:46:05,101 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_e0cee047-ab96-4401-a4fc-4bf98b728b98/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-20 22:46:05,109 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_e0cee047-ab96-4401-a4fc-4bf98b728b98/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-20 22:46:06,039 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,045 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,047 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,048 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,049 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,067 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,067 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,069 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,070 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,071 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,072 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,073 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,074 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,437 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 22:46:06,438 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 22:46:06,439 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 22:46:06,441 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 22:46:06,442 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 22:46:06,443 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 22:46:06,443 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 22:46:06,444 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 22:46:06,445 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 22:46:06,445 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 22:46:06,598 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 22:46:06,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:46:06,663 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:46:06,703 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_e0cee047-ab96-4401-a4fc-4bf98b728b98/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-20 22:46:06,723 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_e0cee047-ab96-4401-a4fc-4bf98b728b98/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-20 22:46:06,787 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,788 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,788 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,788 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,788 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,794 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,795 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,795 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,796 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,796 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,797 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,797 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,797 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 22:46:06,844 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 22:46:06,844 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 22:46:06,845 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 22:46:06,846 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 22:46:06,851 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 22:46:06,852 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 22:46:06,852 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 22:46:06,853 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 22:46:06,854 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 22:46:06,854 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 22:46:06,883 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 22:46:06,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:46:07,157 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:46:07,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:07 WrapperNode [2021-11-20 22:46:07,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:46:07,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:46:07,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:46:07,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:46:07,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:07" (1/1) ... [2021-11-20 22:46:07,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:07" (1/1) ... [2021-11-20 22:46:07,341 INFO L137 Inliner]: procedures = 679, calls = 1046, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 225 [2021-11-20 22:46:07,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:46:07,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:46:07,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:46:07,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:46:07,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:07" (1/1) ... [2021-11-20 22:46:07,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:07" (1/1) ... [2021-11-20 22:46:07,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:07" (1/1) ... [2021-11-20 22:46:07,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:07" (1/1) ... [2021-11-20 22:46:07,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:07" (1/1) ... [2021-11-20 22:46:07,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:07" (1/1) ... [2021-11-20 22:46:07,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:07" (1/1) ... [2021-11-20 22:46:07,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:46:07,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:46:07,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:46:07,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:46:07,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:07" (1/1) ... [2021-11-20 22:46:07,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:46:07,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:07,453 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:46:07,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:46:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-20 22:46:07,504 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-20 22:46:07,505 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-11-20 22:46:07,506 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-11-20 22:46:07,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:46:07,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 22:46:07,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 22:46:07,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 22:46:07,507 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-20 22:46:07,507 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-20 22:46:07,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:46:07,507 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-20 22:46:07,508 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-20 22:46:07,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:46:07,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:46:07,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:46:07,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:46:07,508 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-20 22:46:07,509 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-20 22:46:07,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 22:46:07,510 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 22:46:07,510 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 22:46:07,511 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 22:46:07,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 22:46:07,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:46:07,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 22:46:07,511 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-20 22:46:07,511 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-20 22:46:07,512 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-20 22:46:07,512 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-20 22:46:07,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:46:07,833 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:46:07,841 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:46:08,177 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:46:08,343 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:46:08,344 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 22:46:08,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:46:08 BoogieIcfgContainer [2021-11-20 22:46:08,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:46:08,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:46:08,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:46:08,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:46:08,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:46:04" (1/3) ... [2021-11-20 22:46:08,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f83f10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:46:08, skipping insertion in model container [2021-11-20 22:46:08,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:07" (2/3) ... [2021-11-20 22:46:08,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f83f10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:46:08, skipping insertion in model container [2021-11-20 22:46:08,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:46:08" (3/3) ... [2021-11-20 22:46:08,358 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_front_harness.i [2021-11-20 22:46:08,367 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:46:08,367 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:46:08,433 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:46:08,449 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 22:46:08,461 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:46:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 52 states have internal predecessors, (63), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-20 22:46:08,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 22:46:08,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:08,499 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 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] [2021-11-20 22:46:08,500 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:08,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:08,506 INFO L85 PathProgramCache]: Analyzing trace with hash 900379934, now seen corresponding path program 1 times [2021-11-20 22:46:08,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:08,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371697015] [2021-11-20 22:46:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:08,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 22:46:09,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:09,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371697015] [2021-11-20 22:46:09,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371697015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:46:09,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805413468] [2021-11-20 22:46:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:09,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:09,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:09,069 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:46:09,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:46:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:09,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-20 22:46:09,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:46:09,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:09,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 22:46:09,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:09,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 22:46:09,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:09,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:09,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:09,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:09,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:09,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:09,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-20 22:46:09,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:09,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:09,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:09,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:09,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:09,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:09,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-20 22:46:12,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:12,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:12,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:12,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:12,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:12,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:12,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:12,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:12,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:12,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:12,982 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-20 22:46:12,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 7 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 38 case distinctions, treesize of input 192 treesize of output 138 [2021-11-20 22:46:12,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:12,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:12,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:12,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:12,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:12,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:12,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:12,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:12,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:12,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:46:13,004 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-20 22:46:13,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 7 disjoint index pairs (out of 55 index pairs), introduced 8 new quantified variables, introduced 34 case distinctions, treesize of input 91 treesize of output 41 [2021-11-20 22:46:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 22:46:13,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:46:13,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805413468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:46:13,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:46:13,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-11-20 22:46:13,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66011404] [2021-11-20 22:46:13,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:46:13,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 22:46:13,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 22:46:13,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:46:13,111 INFO L87 Difference]: Start difference. First operand has 99 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 52 states have internal predecessors, (63), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-20 22:46:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:13,626 INFO L93 Difference]: Finished difference Result 232 states and 346 transitions. [2021-11-20 22:46:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 22:46:13,629 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 70 [2021-11-20 22:46:13,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:13,639 INFO L225 Difference]: With dead ends: 232 [2021-11-20 22:46:13,639 INFO L226 Difference]: Without dead ends: 143 [2021-11-20 22:46:13,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:46:13,647 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 19 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:13,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 707 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2021-11-20 22:46:13,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-20 22:46:13,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2021-11-20 22:46:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 58 states have internal predecessors, (68), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-20 22:46:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 153 transitions. [2021-11-20 22:46:13,708 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 153 transitions. Word has length 70 [2021-11-20 22:46:13,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:13,709 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 153 transitions. [2021-11-20 22:46:13,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-20 22:46:13,709 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 153 transitions. [2021-11-20 22:46:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 22:46:13,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:13,714 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 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] [2021-11-20 22:46:13,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:46:13,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:13,939 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:13,940 INFO L85 PathProgramCache]: Analyzing trace with hash 134050646, now seen corresponding path program 1 times [2021-11-20 22:46:13,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:13,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386103275] [2021-11-20 22:46:13,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:13,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-20 22:46:14,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:14,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386103275] [2021-11-20 22:46:14,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386103275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:46:14,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733328551] [2021-11-20 22:46:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:14,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:14,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:14,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:46:14,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:46:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:14,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-20 22:46:14,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:46:14,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:46:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 22:46:14,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 22:46:14,705 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:46:14,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 22:46:14,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2021-11-20 22:46:14,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 76 [2021-11-20 22:46:14,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,893 INFO L354 Elim1Store]: treesize reduction 264, result has 14.8 percent of original size [2021-11-20 22:46:14,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 185 treesize of output 139 [2021-11-20 22:46:14,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:14,965 INFO L354 Elim1Store]: treesize reduction 276, result has 16.4 percent of original size [2021-11-20 22:46:14,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 160 treesize of output 148 [2021-11-20 22:46:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-20 22:46:23,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:46:52,827 WARN L227 SmtUtils]: Spent 10.38s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 22:47:04,612 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-20 22:47:04,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2849702 treesize of output 2841574 [2021-11-20 22:49:56,197 WARN L227 SmtUtils]: Spent 2.86m on a formula simplification. DAG size of input: 1541 DAG size of output: 1519 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:49:56,492 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-20 22:49:56,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 6920722 treesize of output 6906854 [2021-11-20 22:54:38,768 WARN L227 SmtUtils]: Spent 4.70m on a formula simplification. DAG size of input: 4486 DAG size of output: 4486 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 22:54:39,509 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 22:54:39,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1926995645] [2021-11-20 22:54:39,535 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2021-11-20 22:54:39,535 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:54:39,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:54:39,545 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:54:39,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:54:39,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:39,735 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 22:54:39,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-20 22:54:39,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:39,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-20 22:54:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-20 22:54:42,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-20 22:54:42,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-20 22:54:42,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-20 22:54:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:42,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:42,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:42,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:42,894 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-20 22:54:42,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-20 22:54:42,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:42,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,066 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-20 22:54:43,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-20 22:54:43,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,343 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-20 22:54:43,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-20 22:54:43,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:43,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-20 22:54:43,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-20 22:54:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-20 22:54:43,830 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 22:54:43,832 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-20 22:54:43,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:43,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:43,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:43,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:44,249 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-20 22:54:44,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 421 treesize of output 449 [2021-11-20 22:54:44,786 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-20 22:54:44,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 488 treesize of output 578 [2021-11-20 22:54:45,135 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-20 22:54:45,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 572 treesize of output 653 [2021-11-20 22:54:45,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:45,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:45,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:54:45,456 INFO L354 Elim1Store]: treesize reduction 370, result has 20.4 percent of original size [2021-11-20 22:54:45,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 653 treesize of output 675 [2021-11-20 22:54:45,582 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-20 22:54:45,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 720 treesize of output 691 [2021-11-20 22:54:45,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:45,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 688 treesize of output 675 [2021-11-20 22:54:45,740 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:54:45,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 676 treesize of output 624 [2021-11-20 22:54:56,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:54:56,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:54:56,829 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:54:56,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-20 22:54:56,864 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 22:54:56,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 146 [2021-11-20 22:54:56,908 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:54:56,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 140 [2021-11-20 22:54:56,948 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:54:56,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-20 22:54:57,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:57,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-20 22:54:57,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:57,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-20 22:54:57,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:57,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:57,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-20 22:54:57,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:57,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-20 22:55:02,054 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 53 for LOIs [2021-11-20 22:55:02,560 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-20 22:55:04,302 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-20 22:55:04,359 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-20 22:55:04,511 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:55:21,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1926995645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:21,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:55:21,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [5] total 26 [2021-11-20 22:55:21,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237563587] [2021-11-20 22:55:21,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:21,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 22:55:21,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:21,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 22:55:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1659, Unknown=10, NotChecked=0, Total=1806 [2021-11-20 22:55:21,289 INFO L87 Difference]: Start difference. First operand 113 states and 153 transitions. Second operand has 23 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 12 states have internal predecessors, (20), 9 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-20 22:55:29,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:29,366 INFO L93 Difference]: Finished difference Result 214 states and 288 transitions. [2021-11-20 22:55:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 22:55:29,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 12 states have internal predecessors, (20), 9 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) Word has length 71 [2021-11-20 22:55:29,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:29,371 INFO L225 Difference]: With dead ends: 214 [2021-11-20 22:55:29,371 INFO L226 Difference]: Without dead ends: 132 [2021-11-20 22:55:29,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 142 SyntacticMatches, 25 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 60.6s TimeCoverageRelationStatistics Valid=190, Invalid=2249, Unknown=11, NotChecked=0, Total=2450 [2021-11-20 22:55:29,375 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 44 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:29,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 734 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1022 Invalid, 0 Unknown, 85 Unchecked, 1.4s Time] [2021-11-20 22:55:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-20 22:55:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-11-20 22:55:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 72 states have internal predecessors, (86), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (46), 43 states have call predecessors, (46), 44 states have call successors, (46) [2021-11-20 22:55:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 177 transitions. [2021-11-20 22:55:29,405 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 177 transitions. Word has length 71 [2021-11-20 22:55:29,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:29,406 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 177 transitions. [2021-11-20 22:55:29,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 12 states have internal predecessors, (20), 9 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-20 22:55:29,406 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 177 transitions. [2021-11-20 22:55:29,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 22:55:29,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:29,410 INFO L514 BasicCegarLoop]: trace histogram [9, 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] [2021-11-20 22:55:29,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:55:29,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:29,635 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:29,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:29,635 INFO L85 PathProgramCache]: Analyzing trace with hash -767368542, now seen corresponding path program 1 times [2021-11-20 22:55:29,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:29,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138262633] [2021-11-20 22:55:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:29,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 22:55:29,806 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:29,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138262633] [2021-11-20 22:55:29,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138262633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:55:29,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402816069] [2021-11-20 22:55:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:29,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:29,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:55:29,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:55:29,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 22:55:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:29,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 22:55:29,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:55:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 22:55:30,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:55:30,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402816069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:30,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:55:30,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-20 22:55:30,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830862151] [2021-11-20 22:55:30,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:30,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:55:30,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:30,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:55:30,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:55:30,099 INFO L87 Difference]: Start difference. First operand 132 states and 177 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 22:55:30,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:30,360 INFO L93 Difference]: Finished difference Result 237 states and 320 transitions. [2021-11-20 22:55:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:55:30,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 72 [2021-11-20 22:55:30,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:30,363 INFO L225 Difference]: With dead ends: 237 [2021-11-20 22:55:30,364 INFO L226 Difference]: Without dead ends: 137 [2021-11-20 22:55:30,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-20 22:55:30,366 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 54 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:30,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 520 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:55:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-20 22:55:30,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2021-11-20 22:55:30,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 72 states have internal predecessors, (85), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (46), 43 states have call predecessors, (46), 44 states have call successors, (46) [2021-11-20 22:55:30,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 176 transitions. [2021-11-20 22:55:30,395 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 176 transitions. Word has length 72 [2021-11-20 22:55:30,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:30,396 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 176 transitions. [2021-11-20 22:55:30,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 22:55:30,396 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 176 transitions. [2021-11-20 22:55:30,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 22:55:30,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:30,403 INFO L514 BasicCegarLoop]: trace histogram [9, 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] [2021-11-20 22:55:30,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 22:55:30,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-20 22:55:30,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:30,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:30,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1927036773, now seen corresponding path program 1 times [2021-11-20 22:55:30,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:30,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403097102] [2021-11-20 22:55:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:30,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 22:55:30,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:30,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403097102] [2021-11-20 22:55:30,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403097102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:55:30,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512985077] [2021-11-20 22:55:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:30,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:30,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:55:30,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:55:30,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 22:55:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:30,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 22:55:30,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:55:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 22:55:31,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:55:31,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512985077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:31,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:55:31,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-20 22:55:31,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364519734] [2021-11-20 22:55:31,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:31,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:55:31,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:31,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:55:31,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:55:31,153 INFO L87 Difference]: Start difference. First operand 132 states and 176 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 22:55:31,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:31,483 INFO L93 Difference]: Finished difference Result 258 states and 352 transitions. [2021-11-20 22:55:31,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:55:31,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 74 [2021-11-20 22:55:31,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:31,486 INFO L225 Difference]: With dead ends: 258 [2021-11-20 22:55:31,486 INFO L226 Difference]: Without dead ends: 157 [2021-11-20 22:55:31,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-20 22:55:31,488 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 83 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:31,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 609 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:55:31,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-20 22:55:31,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 133. [2021-11-20 22:55:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 73 states have internal predecessors, (86), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (46), 43 states have call predecessors, (46), 44 states have call successors, (46) [2021-11-20 22:55:31,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 177 transitions. [2021-11-20 22:55:31,521 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 177 transitions. Word has length 74 [2021-11-20 22:55:31,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:31,521 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 177 transitions. [2021-11-20 22:55:31,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 22:55:31,522 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 177 transitions. [2021-11-20 22:55:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 22:55:31,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:31,524 INFO L514 BasicCegarLoop]: trace histogram [9, 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] [2021-11-20 22:55:31,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 22:55:31,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:31,743 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:31,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:31,743 INFO L85 PathProgramCache]: Analyzing trace with hash -48600209, now seen corresponding path program 1 times [2021-11-20 22:55:31,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:31,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330732422] [2021-11-20 22:55:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:31,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 22:55:31,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:31,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330732422] [2021-11-20 22:55:31,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330732422] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:55:31,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455613076] [2021-11-20 22:55:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:31,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:31,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:55:31,912 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:55:31,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 22:55:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:32,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 22:55:32,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:55:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 22:55:32,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:55:32,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455613076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:32,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:55:32,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-20 22:55:32,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673140733] [2021-11-20 22:55:32,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:32,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:55:32,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:32,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:55:32,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:55:32,196 INFO L87 Difference]: Start difference. First operand 133 states and 177 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 22:55:32,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:32,279 INFO L93 Difference]: Finished difference Result 245 states and 338 transitions. [2021-11-20 22:55:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:55:32,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 75 [2021-11-20 22:55:32,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:32,286 INFO L225 Difference]: With dead ends: 245 [2021-11-20 22:55:32,287 INFO L226 Difference]: Without dead ends: 147 [2021-11-20 22:55:32,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:55:32,289 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 6 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:32,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 226 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:55:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-20 22:55:32,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2021-11-20 22:55:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 76 states have internal predecessors, (90), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (46), 43 states have call predecessors, (46), 44 states have call successors, (46) [2021-11-20 22:55:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 181 transitions. [2021-11-20 22:55:32,329 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 181 transitions. Word has length 75 [2021-11-20 22:55:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:32,331 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 181 transitions. [2021-11-20 22:55:32,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 22:55:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 181 transitions. [2021-11-20 22:55:32,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 22:55:32,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:32,337 INFO L514 BasicCegarLoop]: trace histogram [9, 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] [2021-11-20 22:55:32,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 22:55:32,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:32,551 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:32,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:32,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1380483063, now seen corresponding path program 1 times [2021-11-20 22:55:32,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:32,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171677008] [2021-11-20 22:55:32,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:32,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-20 22:55:32,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:32,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171677008] [2021-11-20 22:55:32,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171677008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:55:32,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964681346] [2021-11-20 22:55:32,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:32,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:32,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:55:32,705 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:55:32,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 22:55:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:32,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 22:55:32,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:55:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 22:55:33,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:55:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-20 22:55:33,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964681346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:55:33,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851506568] [2021-11-20 22:55:33,474 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2021-11-20 22:55:33,474 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:55:33,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:55:33,474 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:55:33,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:55:33,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:33,606 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-20 22:55:33,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-20 22:55:33,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:33,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:33,752 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 22:55:33,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-20 22:55:35,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-20 22:55:35,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-20 22:55:35,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-20 22:55:35,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-20 22:55:35,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-20 22:55:35,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-20 22:55:35,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:35,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:35,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:35,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:35,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:36,013 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-20 22:55:36,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-20 22:55:36,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:36,119 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 22:55:36,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-20 22:55:36,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,280 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-20 22:55:36,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-20 22:55:36,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,455 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-20 22:55:36,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-20 22:55:36,549 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-20 22:55:36,554 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-20 22:55:36,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:36,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:36,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:36,921 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-20 22:55:36,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 421 treesize of output 449 [2021-11-20 22:55:36,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:36,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:36,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:36,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:37,153 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-20 22:55:37,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 506 treesize of output 522 [2021-11-20 22:55:37,523 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-20 22:55:37,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 555 treesize of output 636 [2021-11-20 22:55:37,609 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-20 22:55:37,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 636 treesize of output 607 [2021-11-20 22:55:37,996 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-20 22:55:37,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 604 treesize of output 694 [2021-11-20 22:55:38,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:38,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:38,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 688 treesize of output 675 [2021-11-20 22:55:38,123 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:55:38,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 676 treesize of output 624 [2021-11-20 22:55:48,867 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:55:48,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-20 22:55:48,894 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 22:55:48,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 146 [2021-11-20 22:55:48,924 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:55:48,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 140 [2021-11-20 22:55:48,971 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:55:48,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-20 22:55:49,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:55:49,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:55:49,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:49,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-20 22:55:49,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:49,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-20 22:55:49,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:49,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:49,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-20 22:55:49,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:49,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-20 22:55:54,860 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 52 for LOIs [2021-11-20 22:55:55,236 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-20 22:55:58,070 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-20 22:55:58,104 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-20 22:55:58,194 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 59 for LOIs [2021-11-20 22:55:58,439 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:56:01,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [851506568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:01,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:56:01,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [6, 11, 6] total 42 [2021-11-20 22:56:01,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642625794] [2021-11-20 22:56:01,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:01,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 22:56:01,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:01,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 22:56:01,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1590, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 22:56:01,954 INFO L87 Difference]: Start difference. First operand 136 states and 181 transitions. Second operand has 29 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 16 states have internal predecessors, (27), 10 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2021-11-20 22:56:05,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:05,848 INFO L93 Difference]: Finished difference Result 246 states and 327 transitions. [2021-11-20 22:56:05,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 22:56:05,849 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 16 states have internal predecessors, (27), 10 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 79 [2021-11-20 22:56:05,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:05,851 INFO L225 Difference]: With dead ends: 246 [2021-11-20 22:56:05,851 INFO L226 Difference]: Without dead ends: 143 [2021-11-20 22:56:05,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 197 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=212, Invalid=2440, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 22:56:05,853 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 62 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:05,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 609 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1121 Invalid, 0 Unknown, 92 Unchecked, 1.7s Time] [2021-11-20 22:56:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-20 22:56:05,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-11-20 22:56:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 79 states have internal predecessors, (94), 46 states have call successors, (46), 17 states have call predecessors, (46), 17 states have return successors, (47), 44 states have call predecessors, (47), 45 states have call successors, (47) [2021-11-20 22:56:05,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 187 transitions. [2021-11-20 22:56:05,878 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 187 transitions. Word has length 79 [2021-11-20 22:56:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:05,878 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 187 transitions. [2021-11-20 22:56:05,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 16 states have internal predecessors, (27), 10 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2021-11-20 22:56:05,878 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 187 transitions. [2021-11-20 22:56:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 22:56:05,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:05,880 INFO L514 BasicCegarLoop]: trace histogram [9, 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] [2021-11-20 22:56:05,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:56:06,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:56:06,087 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:06,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:06,088 INFO L85 PathProgramCache]: Analyzing trace with hash 574053552, now seen corresponding path program 1 times [2021-11-20 22:56:06,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:06,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060893682] [2021-11-20 22:56:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:06,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 22:56:06,211 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:06,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060893682] [2021-11-20 22:56:06,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060893682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:56:06,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54341687] [2021-11-20 22:56:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:06,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:56:06,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:56:06,213 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:56:06,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 22:56:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:06,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 22:56:06,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:56:06,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:56:06,564 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:56:06,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-20 22:56:06,577 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:56:06,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 22:56:06,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:06,651 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-20 22:56:06,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 79 treesize of output 47 [2021-11-20 22:56:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 22:56:09,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:56:15,397 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 3236 treesize of output 3204 [2021-11-20 22:56:15,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54341687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:56:15,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1076518266] [2021-11-20 22:56:15,907 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2021-11-20 22:56:15,907 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:56:15,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:56:15,908 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:56:15,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:56:15,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:16,006 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 22:56:16,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-20 22:56:16,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:16,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-20 22:56:18,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-20 22:56:18,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-20 22:56:18,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-20 22:56:18,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-20 22:56:18,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,522 INFO L354 Elim1Store]: treesize reduction 122, result has 27.4 percent of original size [2021-11-20 22:56:18,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 47 treesize of output 85 [2021-11-20 22:56:18,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-20 22:56:18,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:18,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:18,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:18,674 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 22:56:18,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 91 treesize of output 99 [2021-11-20 22:56:18,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-20 22:56:18,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:18,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-20 22:56:19,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,033 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 22:56:19,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 54 [2021-11-20 22:56:19,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:19,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:19,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:19,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:19,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:20,046 INFO L354 Elim1Store]: treesize reduction 483, result has 19.9 percent of original size [2021-11-20 22:56:20,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 742 treesize of output 751 [2021-11-20 22:56:20,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:20,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:20,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:20,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:20,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:20,544 INFO L354 Elim1Store]: treesize reduction 603, result has 18.0 percent of original size [2021-11-20 22:56:20,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 833 treesize of output 842 [2021-11-20 22:56:20,859 INFO L354 Elim1Store]: treesize reduction 230, result has 21.8 percent of original size [2021-11-20 22:56:20,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 936 treesize of output 971 [2021-11-20 22:56:21,066 INFO L354 Elim1Store]: treesize reduction 182, result has 18.0 percent of original size [2021-11-20 22:56:21,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 961 treesize of output 973 [2021-11-20 22:56:21,130 INFO L354 Elim1Store]: treesize reduction 128, result has 10.5 percent of original size [2021-11-20 22:56:21,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 967 treesize of output 920 [2021-11-20 22:56:21,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:21,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:21,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 922 treesize of output 901 [2021-11-20 22:56:21,243 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:56:21,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 910 treesize of output 858 [2021-11-20 22:56:27,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:56:27,925 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:56:27,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-20 22:56:27,958 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 22:56:27,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 146 [2021-11-20 22:56:27,994 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:56:27,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 140 [2021-11-20 22:56:28,026 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:56:28,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-20 22:56:28,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:56:28,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:28,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-20 22:56:28,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:28,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-20 22:56:28,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:28,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:28,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-20 22:56:28,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:28,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-20 22:56:33,479 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 52 for LOIs [2021-11-20 22:56:33,903 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-20 22:56:40,022 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-20 22:56:40,054 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-20 22:56:40,140 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-20 22:56:40,590 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:56:44,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1076518266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:44,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:56:44,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [7, 13] total 48 [2021-11-20 22:56:44,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290714358] [2021-11-20 22:56:44,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:44,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 22:56:44,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:44,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 22:56:44,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3075, Unknown=1, NotChecked=0, Total=3306 [2021-11-20 22:56:44,549 INFO L87 Difference]: Start difference. First operand 141 states and 187 transitions. Second operand has 31 states, 20 states have (on average 1.45) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2021-11-20 22:56:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:50,793 INFO L93 Difference]: Finished difference Result 258 states and 344 transitions. [2021-11-20 22:56:50,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 22:56:50,793 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 20 states have (on average 1.45) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 81 [2021-11-20 22:56:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:50,795 INFO L225 Difference]: With dead ends: 258 [2021-11-20 22:56:50,795 INFO L226 Difference]: Without dead ends: 152 [2021-11-20 22:56:50,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 173 SyntacticMatches, 13 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=372, Invalid=4596, Unknown=2, NotChecked=0, Total=4970 [2021-11-20 22:56:50,799 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 123 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:50,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 481 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1750 Invalid, 0 Unknown, 119 Unchecked, 2.2s Time] [2021-11-20 22:56:50,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-20 22:56:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2021-11-20 22:56:50,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 81 states have internal predecessors, (96), 46 states have call successors, (46), 18 states have call predecessors, (46), 18 states have return successors, (47), 44 states have call predecessors, (47), 45 states have call successors, (47) [2021-11-20 22:56:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2021-11-20 22:56:50,824 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 81 [2021-11-20 22:56:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:50,825 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2021-11-20 22:56:50,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 20 states have (on average 1.45) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2021-11-20 22:56:50,825 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2021-11-20 22:56:50,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 22:56:50,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:50,826 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:50,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 22:56:51,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:56:51,047 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:51,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:51,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1670143182, now seen corresponding path program 1 times [2021-11-20 22:56:51,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:51,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15771352] [2021-11-20 22:56:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:51,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 22:56:51,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:51,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15771352] [2021-11-20 22:56:51,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15771352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:56:51,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578227561] [2021-11-20 22:56:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:51,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:56:51,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:56:51,125 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:56:51,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 22:56:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:51,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-20 22:56:51,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:56:51,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:51,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:51,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 22:56:51,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:51,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-20 22:56:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 22:56:58,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-20 22:57:03,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578227561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:57:03,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271558163] [2021-11-20 22:57:03,030 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2021-11-20 22:57:03,030 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:57:03,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:57:03,031 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:57:03,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:57:03,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:03,125 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-20 22:57:03,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-20 22:57:03,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:03,222 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 22:57:03,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-20 22:57:05,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-20 22:57:05,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-20 22:57:05,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-20 22:57:05,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-20 22:57:05,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2021-11-20 22:57:05,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-20 22:57:05,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-20 22:57:05,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:05,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-20 22:57:09,150 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 120 for LOIs [2021-11-20 22:57:10,970 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2021-11-20 22:57:10,988 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-20 22:57:11,163 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:57:14,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [271558163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:14,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:57:14,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 18, 11] total 41 [2021-11-20 22:57:14,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557499871] [2021-11-20 22:57:14,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:14,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 22:57:14,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:57:14,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 22:57:14,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 22:57:14,146 INFO L87 Difference]: Start difference. First operand 144 states and 189 transitions. Second operand has 13 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-20 22:57:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:14,413 INFO L93 Difference]: Finished difference Result 259 states and 336 transitions. [2021-11-20 22:57:14,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 22:57:14,413 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 81 [2021-11-20 22:57:14,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:14,414 INFO L225 Difference]: With dead ends: 259 [2021-11-20 22:57:14,414 INFO L226 Difference]: Without dead ends: 129 [2021-11-20 22:57:14,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 191 SyntacticMatches, 16 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 22:57:14,416 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 120 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:14,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 171 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 136 Invalid, 0 Unknown, 106 Unchecked, 0.2s Time] [2021-11-20 22:57:14,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-20 22:57:14,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-20 22:57:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 74 states have internal predecessors, (88), 40 states have call successors, (40), 15 states have call predecessors, (40), 16 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2021-11-20 22:57:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 169 transitions. [2021-11-20 22:57:14,437 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 169 transitions. Word has length 81 [2021-11-20 22:57:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:14,438 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 169 transitions. [2021-11-20 22:57:14,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-20 22:57:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 169 transitions. [2021-11-20 22:57:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 22:57:14,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:14,439 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:14,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 22:57:14,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 22:57:14,651 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:57:14,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:14,651 INFO L85 PathProgramCache]: Analyzing trace with hash 175788538, now seen corresponding path program 1 times [2021-11-20 22:57:14,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:57:14,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260494110] [2021-11-20 22:57:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:14,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:57:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-20 22:57:14,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:57:14,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260494110] [2021-11-20 22:57:14,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260494110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:57:14,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311960666] [2021-11-20 22:57:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:14,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:57:14,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:57:14,767 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:57:14,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 22:57:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:14,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-20 22:57:14,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:14,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 22:57:15,095 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:57:15,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 22:57:15,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:15,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 22:57:15,176 INFO L354 Elim1Store]: treesize reduction 124, result has 18.4 percent of original size [2021-11-20 22:57:15,177 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 68 treesize of output 53 [2021-11-20 22:57:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 22:57:21,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:27,619 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 26413 treesize of output 26157 [2021-11-20 22:57:30,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311960666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:57:30,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673053038] [2021-11-20 22:57:30,814 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2021-11-20 22:57:30,814 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:57:30,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:57:30,815 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:57:30,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:57:30,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:30,935 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-20 22:57:30,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-20 22:57:30,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:30,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:31,031 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-20 22:57:31,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-20 22:57:32,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-20 22:57:32,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-20 22:57:32,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-20 22:57:32,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:32,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-20 22:57:33,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:33,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:33,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:33,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:33,175 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-20 22:57:33,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-20 22:57:33,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-20 22:57:33,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:33,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:33,362 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 22:57:33,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-20 22:57:33,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,533 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-20 22:57:33,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-20 22:57:33,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,736 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-20 22:57:33,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-20 22:57:33,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:33,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-20 22:57:33,961 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-20 22:57:33,962 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-20 22:57:34,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:34,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:34,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:34,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:34,356 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-20 22:57:34,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 421 treesize of output 449 [2021-11-20 22:57:34,659 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-20 22:57:34,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 488 treesize of output 569 [2021-11-20 22:57:35,050 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-20 22:57:35,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 569 treesize of output 659 [2021-11-20 22:57:35,131 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-20 22:57:35,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 653 treesize of output 636 [2021-11-20 22:57:35,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:35,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:35,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:35,399 INFO L354 Elim1Store]: treesize reduction 370, result has 20.4 percent of original size [2021-11-20 22:57:35,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 633 treesize of output 655 [2021-11-20 22:57:35,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:35,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 688 treesize of output 675 [2021-11-20 22:57:35,493 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:57:35,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 676 treesize of output 624 [2021-11-20 22:57:46,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:57:46,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:57:46,475 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:57:46,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-20 22:57:46,505 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-20 22:57:46,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 146 [2021-11-20 22:57:46,541 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:57:46,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 140 [2021-11-20 22:57:46,592 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-20 22:57:46,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-20 22:57:46,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:46,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-20 22:57:46,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:46,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-20 22:57:46,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:46,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-20 22:57:46,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:46,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:46,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-20 22:57:55,266 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 52 for LOIs [2021-11-20 22:57:55,730 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2021-11-20 22:57:55,864 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-20 22:58:02,170 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-20 22:58:02,228 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 102 for LOIs [2021-11-20 22:58:02,382 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-20 22:58:02,812 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:58:08,949 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:58:08,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:58:08,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13] total 17 [2021-11-20 22:58:08,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160534336] [2021-11-20 22:58:08,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:58:08,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 22:58:08,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:58:08,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 22:58:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=4145, Unknown=4, NotChecked=0, Total=4422 [2021-11-20 22:58:08,953 INFO L87 Difference]: Start difference. First operand 129 states and 169 transitions. Second operand has 17 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2021-11-20 22:58:09,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:09,195 INFO L93 Difference]: Finished difference Result 279 states and 361 transitions. [2021-11-20 22:58:09,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 22:58:09,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) Word has length 82 [2021-11-20 22:58:09,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:09,197 INFO L225 Difference]: With dead ends: 279 [2021-11-20 22:58:09,198 INFO L226 Difference]: Without dead ends: 160 [2021-11-20 22:58:09,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 164 SyntacticMatches, 14 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=287, Invalid=4539, Unknown=4, NotChecked=0, Total=4830 [2021-11-20 22:58:09,200 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 17 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:09,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 717 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 138 Unchecked, 0.1s Time] [2021-11-20 22:58:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-20 22:58:09,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-11-20 22:58:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 89 states have (on average 1.202247191011236) internal successors, (107), 92 states have internal predecessors, (107), 47 states have call successors, (47), 20 states have call predecessors, (47), 21 states have return successors, (49), 45 states have call predecessors, (49), 46 states have call successors, (49) [2021-11-20 22:58:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 203 transitions. [2021-11-20 22:58:09,228 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 203 transitions. Word has length 82 [2021-11-20 22:58:09,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:09,229 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 203 transitions. [2021-11-20 22:58:09,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2021-11-20 22:58:09,229 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 203 transitions. [2021-11-20 22:58:09,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 22:58:09,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:09,231 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:09,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:09,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:58:09,451 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:58:09,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash -9649618, now seen corresponding path program 1 times [2021-11-20 22:58:09,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:58:09,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426274214] [2021-11-20 22:58:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:09,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:58:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-20 22:58:09,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:58:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426274214] [2021-11-20 22:58:09,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426274214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:58:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639483099] [2021-11-20 22:58:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:09,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:58:09,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:58:09,595 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:58:09,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 22:58:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:09,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 22:58:09,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 22:58:09,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:58:09,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639483099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:09,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:58:09,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-20 22:58:09,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654387157] [2021-11-20 22:58:09,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:09,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:58:09,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:58:09,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:58:09,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:58:09,956 INFO L87 Difference]: Start difference. First operand 158 states and 203 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-20 22:58:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:10,200 INFO L93 Difference]: Finished difference Result 271 states and 349 transitions. [2021-11-20 22:58:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:58:10,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 85 [2021-11-20 22:58:10,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:10,203 INFO L225 Difference]: With dead ends: 271 [2021-11-20 22:58:10,203 INFO L226 Difference]: Without dead ends: 160 [2021-11-20 22:58:10,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-20 22:58:10,204 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 59 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:10,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 606 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:58:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-20 22:58:10,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-11-20 22:58:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 92 states have internal predecessors, (106), 47 states have call successors, (47), 20 states have call predecessors, (47), 21 states have return successors, (49), 45 states have call predecessors, (49), 46 states have call successors, (49) [2021-11-20 22:58:10,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 202 transitions. [2021-11-20 22:58:10,231 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 202 transitions. Word has length 85 [2021-11-20 22:58:10,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:10,232 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 202 transitions. [2021-11-20 22:58:10,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-20 22:58:10,232 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 202 transitions. [2021-11-20 22:58:10,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 22:58:10,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:10,233 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:10,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:10,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 22:58:10,451 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:58:10,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:10,451 INFO L85 PathProgramCache]: Analyzing trace with hash -443805675, now seen corresponding path program 1 times [2021-11-20 22:58:10,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:58:10,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068816828] [2021-11-20 22:58:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:10,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:58:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-20 22:58:10,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:58:10,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068816828] [2021-11-20 22:58:10,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068816828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:58:10,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264591115] [2021-11-20 22:58:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:10,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:58:10,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:58:10,571 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:58:10,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 22:58:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:10,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 22:58:10,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 22:58:10,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:58:10,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264591115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:10,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:58:10,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-11-20 22:58:10,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587533917] [2021-11-20 22:58:10,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:10,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 22:58:10,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:58:10,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 22:58:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-20 22:58:10,970 INFO L87 Difference]: Start difference. First operand 158 states and 202 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-20 22:58:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:11,252 INFO L93 Difference]: Finished difference Result 284 states and 367 transitions. [2021-11-20 22:58:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:58:11,253 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 87 [2021-11-20 22:58:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:11,257 INFO L225 Difference]: With dead ends: 284 [2021-11-20 22:58:11,257 INFO L226 Difference]: Without dead ends: 172 [2021-11-20 22:58:11,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-20 22:58:11,258 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 68 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:11,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 715 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:58:11,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-20 22:58:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2021-11-20 22:58:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 92 states have internal predecessors, (105), 47 states have call successors, (47), 20 states have call predecessors, (47), 21 states have return successors, (49), 45 states have call predecessors, (49), 46 states have call successors, (49) [2021-11-20 22:58:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 201 transitions. [2021-11-20 22:58:11,286 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 201 transitions. Word has length 87 [2021-11-20 22:58:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:11,286 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 201 transitions. [2021-11-20 22:58:11,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-20 22:58:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 201 transitions. [2021-11-20 22:58:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-20 22:58:11,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:11,288 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 22:58:11,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:11,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:58:11,511 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:58:11,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:11,511 INFO L85 PathProgramCache]: Analyzing trace with hash -296112527, now seen corresponding path program 1 times [2021-11-20 22:58:11,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:58:11,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180123019] [2021-11-20 22:58:11,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:11,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:58:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-20 22:58:11,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:58:11,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180123019] [2021-11-20 22:58:11,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180123019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:58:11,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727107523] [2021-11-20 22:58:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:11,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:58:11,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:58:11,610 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:58:11,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0cee047-ab96-4401-a4fc-4bf98b728b98/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 22:58:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:11,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-20 22:58:11,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:11,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:58:11,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:11,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-20 22:58:11,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:11,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:12,045 INFO L354 Elim1Store]: treesize reduction 87, result has 35.1 percent of original size [2021-11-20 22:58:12,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 70 [2021-11-20 22:58:13,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:13,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:13,928 INFO L354 Elim1Store]: treesize reduction 216, result has 31.6 percent of original size [2021-11-20 22:58:13,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 111 treesize of output 159