./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_find_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_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b2aa49e297f60cfce052f243c4868c3f21a4b7a15679d0734b9f9fae5c35ea17 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:26:36,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:26:36,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:26:36,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:26:36,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:26:36,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:26:36,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:26:36,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:26:36,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:26:36,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:26:36,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:26:36,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:26:36,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:26:36,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:26:36,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:26:36,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:26:36,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:26:36,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:26:36,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:26:36,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:26:36,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:26:36,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:26:36,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:26:36,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:26:36,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:26:36,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:26:36,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:26:36,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:26:36,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:26:36,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:26:36,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:26:36,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:26:36,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:26:36,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:26:36,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:26:36,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:26:36,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:26:36,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:26:36,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:26:36,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:26:36,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:26:36,835 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 07:26:36,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:26:36,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:26:36,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:26:36,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:26:36,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:26:36,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:26:36,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:26:36,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:26:36,873 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:26:36,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:26:36,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:26:36,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:26:36,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:26:36,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:26:36,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:26:36,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:26:36,875 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:26:36,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:26:36,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:26:36,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:26:36,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:26:36,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:26:36,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:26:36,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:26:36,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:26:36,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:26:36,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:26:36,878 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:26:36,879 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:26:36,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:26:36,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:26:36,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2aa49e297f60cfce052f243c4868c3f21a4b7a15679d0734b9f9fae5c35ea17 [2021-11-20 07:26:37,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:26:37,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:26:37,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:26:37,206 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:26:37,207 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:26:37,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i [2021-11-20 07:26:37,299 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/data/1fdc8ea5f/2a2998e649454d05baea37d4da22791e/FLAG74f5da530 [2021-11-20 07:26:38,414 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:26:38,414 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i [2021-11-20 07:26:38,487 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/data/1fdc8ea5f/2a2998e649454d05baea37d4da22791e/FLAG74f5da530 [2021-11-20 07:26:38,768 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/data/1fdc8ea5f/2a2998e649454d05baea37d4da22791e [2021-11-20 07:26:38,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:26:38,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:26:38,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:26:38,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:26:38,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:26:38,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:26:38" (1/1) ... [2021-11-20 07:26:38,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@429b6571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:38, skipping insertion in model container [2021-11-20 07:26:38,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:26:38" (1/1) ... [2021-11-20 07:26:38,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:26:38,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:26:39,322 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_996f6630-1508-4157-8040-5ee7391123d5/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4493,4506] [2021-11-20 07:26:39,333 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_996f6630-1508-4157-8040-5ee7391123d5/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4553,4566] [2021-11-20 07:26:40,700 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:40,701 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:40,702 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:40,703 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:40,705 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:40,740 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:40,741 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:40,744 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:40,745 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:40,752 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:40,754 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:40,760 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:40,760 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:41,582 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 07:26:41,584 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 07:26:41,585 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 07:26:41,587 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 07:26:41,589 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 07:26:41,590 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 07:26:41,591 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 07:26:41,592 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 07:26:41,594 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 07:26:41,598 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 07:26:41,857 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 07:26:42,278 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,279 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,324 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,327 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,339 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,340 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,367 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,374 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,376 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,377 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,377 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,378 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,378 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:26:42,522 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:26:42,555 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_996f6630-1508-4157-8040-5ee7391123d5/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4493,4506] [2021-11-20 07:26:42,556 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_996f6630-1508-4157-8040-5ee7391123d5/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4553,4566] [2021-11-20 07:26:42,607 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,607 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,608 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,608 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,609 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,615 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,615 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,616 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,617 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,618 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,618 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,619 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,619 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,655 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 07:26:42,655 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 07:26:42,656 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 07:26:42,657 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 07:26:42,658 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 07:26:42,659 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 07:26:42,659 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 07:26:42,660 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 07:26:42,660 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 07:26:42,661 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 07:26:42,690 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 07:26:42,850 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,850 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,864 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,865 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,915 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,915 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,925 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,926 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,926 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,927 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,928 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,928 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,929 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:26:42,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:26:43,357 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:26:43,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:43 WrapperNode [2021-11-20 07:26:43,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:26:43,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:26:43,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:26:43,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:26:43,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:43" (1/1) ... [2021-11-20 07:26:43,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:43" (1/1) ... [2021-11-20 07:26:43,636 INFO L137 Inliner]: procedures = 774, calls = 2455, calls flagged for inlining = 69, calls inlined = 20, statements flattened = 838 [2021-11-20 07:26:43,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:26:43,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:26:43,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:26:43,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:26:43,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:43" (1/1) ... [2021-11-20 07:26:43,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:43" (1/1) ... [2021-11-20 07:26:43,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:43" (1/1) ... [2021-11-20 07:26:43,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:43" (1/1) ... [2021-11-20 07:26:43,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:43" (1/1) ... [2021-11-20 07:26:43,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:43" (1/1) ... [2021-11-20 07:26:43,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:43" (1/1) ... [2021-11-20 07:26:43,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:26:43,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:26:43,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:26:43,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:26:43,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:43" (1/1) ... [2021-11-20 07:26:43,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:26:43,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:43,811 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:26:43,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:26:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-20 07:26:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:26:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-20 07:26:43,868 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-20 07:26:43,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 07:26:43,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 07:26:43,870 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2021-11-20 07:26:43,871 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2021-11-20 07:26:43,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:26:43,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:26:43,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:26:43,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:26:43,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:26:43,872 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 07:26:43,872 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 07:26:43,872 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-20 07:26:43,873 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-20 07:26:43,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:26:43,873 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-20 07:26:43,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-20 07:26:43,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:26:43,873 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-20 07:26:43,874 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-20 07:26:43,874 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_find [2021-11-20 07:26:43,874 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_find [2021-11-20 07:26:43,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:26:43,874 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2021-11-20 07:26:43,875 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2021-11-20 07:26:43,875 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2021-11-20 07:26:43,875 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2021-11-20 07:26:43,876 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2021-11-20 07:26:43,876 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2021-11-20 07:26:43,876 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2021-11-20 07:26:43,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2021-11-20 07:26:43,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:26:43,876 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2021-11-20 07:26:43,877 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2021-11-20 07:26:43,877 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2021-11-20 07:26:43,877 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2021-11-20 07:26:43,878 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2021-11-20 07:26:43,878 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2021-11-20 07:26:43,879 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2021-11-20 07:26:43,879 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2021-11-20 07:26:43,882 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 07:26:43,883 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 07:26:43,884 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2021-11-20 07:26:43,884 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2021-11-20 07:26:43,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:26:43,885 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-20 07:26:43,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-20 07:26:43,886 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-20 07:26:43,886 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-20 07:26:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure uninterpreted_equals [2021-11-20 07:26:43,893 INFO L138 BoogieDeclarations]: Found implementation of procedure uninterpreted_equals [2021-11-20 07:26:43,893 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-20 07:26:43,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-20 07:26:43,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:26:44,436 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:26:44,439 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:26:44,588 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2021-11-20 07:26:44,640 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2021-11-20 07:26:44,900 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !true; [2021-11-20 07:26:45,751 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:26:45,762 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:26:45,762 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-20 07:26:45,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:26:45 BoogieIcfgContainer [2021-11-20 07:26:45,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:26:45,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:26:45,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:26:45,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:26:45,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:26:38" (1/3) ... [2021-11-20 07:26:45,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddd6512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:26:45, skipping insertion in model container [2021-11-20 07:26:45,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:26:43" (2/3) ... [2021-11-20 07:26:45,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddd6512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:26:45, skipping insertion in model container [2021-11-20 07:26:45,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:26:45" (3/3) ... [2021-11-20 07:26:45,775 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_table_find_harness.i [2021-11-20 07:26:45,782 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:26:45,783 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:26:45,843 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:26:45,851 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=PETRI_NET, 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 07:26:45,851 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:26:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 246 states, 157 states have (on average 1.2101910828025477) internal successors, (190), 155 states have internal predecessors, (190), 68 states have call successors, (68), 22 states have call predecessors, (68), 22 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2021-11-20 07:26:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-20 07:26:45,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:45,932 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:45,933 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:45,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:45,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2109277801, now seen corresponding path program 1 times [2021-11-20 07:26:45,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:45,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191137046] [2021-11-20 07:26:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:45,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:46,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:26:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:46,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:26:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:46,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:26:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:46,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:26:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:46,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:26:46,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:46,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191137046] [2021-11-20 07:26:46,772 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-20 07:26:46,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034644412] [2021-11-20 07:26:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:46,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:46,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:46,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:46,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:26:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:47,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 2495 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 07:26:47,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2021-11-20 07:26:48,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:26:48,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034644412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:48,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:26:48,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:26:48,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253488935] [2021-11-20 07:26:48,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:48,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:26:48,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:26:48,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:26:48,149 INFO L87 Difference]: Start difference. First operand has 246 states, 157 states have (on average 1.2101910828025477) internal successors, (190), 155 states have internal predecessors, (190), 68 states have call successors, (68), 22 states have call predecessors, (68), 22 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) Second operand has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-20 07:26:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:48,248 INFO L93 Difference]: Finished difference Result 486 states and 686 transitions. [2021-11-20 07:26:48,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:26:48,251 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 182 [2021-11-20 07:26:48,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:48,276 INFO L225 Difference]: With dead ends: 486 [2021-11-20 07:26:48,276 INFO L226 Difference]: Without dead ends: 239 [2021-11-20 07:26:48,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:26:48,301 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:48,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:26:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-20 07:26:48,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-20 07:26:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 148 states have (on average 1.195945945945946) internal successors, (177), 149 states have internal predecessors, (177), 68 states have call successors, (68), 22 states have call predecessors, (68), 22 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2021-11-20 07:26:48,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 312 transitions. [2021-11-20 07:26:48,491 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 312 transitions. Word has length 182 [2021-11-20 07:26:48,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:48,493 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 312 transitions. [2021-11-20 07:26:48,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-20 07:26:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 312 transitions. [2021-11-20 07:26:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-20 07:26:48,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:48,501 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:48,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:48,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:48,725 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:48,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1716640621, now seen corresponding path program 1 times [2021-11-20 07:26:48,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:48,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791279503] [2021-11-20 07:26:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:48,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:48,811 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:48,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328051064] [2021-11-20 07:26:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:48,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:48,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:48,813 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:48,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:26:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:49,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 2495 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:26:49,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-11-20 07:26:50,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:26:50,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:50,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791279503] [2021-11-20 07:26:50,227 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:50,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328051064] [2021-11-20 07:26:50,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328051064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:50,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:26:50,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:26:50,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498391997] [2021-11-20 07:26:50,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:50,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:26:50,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:50,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:26:50,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:26:50,233 INFO L87 Difference]: Start difference. First operand 239 states and 312 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 07:26:50,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:50,612 INFO L93 Difference]: Finished difference Result 464 states and 608 transitions. [2021-11-20 07:26:50,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:26:50,613 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 182 [2021-11-20 07:26:50,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:50,618 INFO L225 Difference]: With dead ends: 464 [2021-11-20 07:26:50,618 INFO L226 Difference]: Without dead ends: 246 [2021-11-20 07:26:50,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:26:50,621 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 325 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:50,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 1041 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:26:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-20 07:26:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2021-11-20 07:26:50,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 153 states have (on average 1.196078431372549) internal successors, (183), 155 states have internal predecessors, (183), 69 states have call successors, (69), 22 states have call predecessors, (69), 23 states have return successors, (70), 68 states have call predecessors, (70), 68 states have call successors, (70) [2021-11-20 07:26:50,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 322 transitions. [2021-11-20 07:26:50,652 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 322 transitions. Word has length 182 [2021-11-20 07:26:50,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:50,652 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 322 transitions. [2021-11-20 07:26:50,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 07:26:50,653 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 322 transitions. [2021-11-20 07:26:50,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-20 07:26:50,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:50,670 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:50,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:50,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-20 07:26:50,897 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:50,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:50,898 INFO L85 PathProgramCache]: Analyzing trace with hash 421077933, now seen corresponding path program 1 times [2021-11-20 07:26:50,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:50,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493858467] [2021-11-20 07:26:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:50,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:51,000 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:51,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991753597] [2021-11-20 07:26:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:51,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:51,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:51,002 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:51,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:26:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:51,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 2505 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:26:51,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-11-20 07:26:52,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:26:52,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:52,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493858467] [2021-11-20 07:26:52,339 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:52,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991753597] [2021-11-20 07:26:52,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991753597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:52,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:26:52,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:26:52,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063149950] [2021-11-20 07:26:52,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:52,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:26:52,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:52,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:26:52,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:26:52,342 INFO L87 Difference]: Start difference. First operand 246 states and 322 transitions. Second operand has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-20 07:26:52,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:52,767 INFO L93 Difference]: Finished difference Result 404 states and 531 transitions. [2021-11-20 07:26:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:26:52,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) Word has length 182 [2021-11-20 07:26:52,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:52,771 INFO L225 Difference]: With dead ends: 404 [2021-11-20 07:26:52,772 INFO L226 Difference]: Without dead ends: 239 [2021-11-20 07:26:52,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:26:52,774 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 321 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:52,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 1528 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:26:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-20 07:26:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-20 07:26:52,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 148 states have (on average 1.1891891891891893) internal successors, (176), 149 states have internal predecessors, (176), 68 states have call successors, (68), 22 states have call predecessors, (68), 22 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2021-11-20 07:26:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 311 transitions. [2021-11-20 07:26:52,805 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 311 transitions. Word has length 182 [2021-11-20 07:26:52,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:52,807 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 311 transitions. [2021-11-20 07:26:52,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-20 07:26:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 311 transitions. [2021-11-20 07:26:52,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-20 07:26:52,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:52,811 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:52,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:53,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:53,033 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash -238453589, now seen corresponding path program 1 times [2021-11-20 07:26:53,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:53,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083351807] [2021-11-20 07:26:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:53,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:53,128 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:53,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554963594] [2021-11-20 07:26:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:53,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:53,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:53,131 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:53,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:26:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:53,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 2510 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:26:53,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-11-20 07:26:54,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:26:54,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:54,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083351807] [2021-11-20 07:26:54,267 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:54,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554963594] [2021-11-20 07:26:54,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554963594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:54,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:26:54,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:26:54,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920969053] [2021-11-20 07:26:54,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:54,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:26:54,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:54,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:26:54,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:26:54,271 INFO L87 Difference]: Start difference. First operand 239 states and 311 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 07:26:54,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:54,317 INFO L93 Difference]: Finished difference Result 474 states and 616 transitions. [2021-11-20 07:26:54,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:26:54,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 182 [2021-11-20 07:26:54,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:54,327 INFO L225 Difference]: With dead ends: 474 [2021-11-20 07:26:54,327 INFO L226 Difference]: Without dead ends: 244 [2021-11-20 07:26:54,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:26:54,337 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 2 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:54,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1228 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:26:54,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-20 07:26:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2021-11-20 07:26:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 152 states have (on average 1.1842105263157894) internal successors, (180), 153 states have internal predecessors, (180), 68 states have call successors, (68), 22 states have call predecessors, (68), 23 states have return successors, (68), 68 states have call predecessors, (68), 67 states have call successors, (68) [2021-11-20 07:26:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 316 transitions. [2021-11-20 07:26:54,380 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 316 transitions. Word has length 182 [2021-11-20 07:26:54,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:54,381 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 316 transitions. [2021-11-20 07:26:54,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 07:26:54,381 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 316 transitions. [2021-11-20 07:26:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-20 07:26:54,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:54,386 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:54,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:54,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:54,609 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:54,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:54,610 INFO L85 PathProgramCache]: Analyzing trace with hash -168770197, now seen corresponding path program 1 times [2021-11-20 07:26:54,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:54,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016888269] [2021-11-20 07:26:54,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:54,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:54,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:26:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:26:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:26:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:26:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:26:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:26:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:26:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:26:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:26:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:26:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:26:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:26:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:26:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:26:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:26:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:26:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 07:26:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 07:26:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:26:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:26:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:26:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-20 07:26:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-20 07:26:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 07:26:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 07:26:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-20 07:26:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-20 07:26:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-11-20 07:26:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-20 07:26:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-11-20 07:26:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2021-11-20 07:26:55,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:55,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016888269] [2021-11-20 07:26:55,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016888269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:26:55,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934346738] [2021-11-20 07:26:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:55,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:55,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:55,837 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:55,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:26:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:56,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 2542 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 07:26:56,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:56,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 07:26:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-11-20 07:26:57,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:26:57,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934346738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:26:57,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:26:57,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 21 [2021-11-20 07:26:57,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775856158] [2021-11-20 07:26:57,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:26:57,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:26:57,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:57,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:26:57,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:26:57,561 INFO L87 Difference]: Start difference. First operand 244 states and 316 transitions. Second operand has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 9 states have internal predecessors, (89), 4 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-20 07:26:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:57,718 INFO L93 Difference]: Finished difference Result 474 states and 611 transitions. [2021-11-20 07:26:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:26:57,719 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 9 states have internal predecessors, (89), 4 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 194 [2021-11-20 07:26:57,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:57,722 INFO L225 Difference]: With dead ends: 474 [2021-11-20 07:26:57,722 INFO L226 Difference]: Without dead ends: 248 [2021-11-20 07:26:57,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:26:57,725 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 35 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:57,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1679 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2021-11-20 07:26:57,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-20 07:26:57,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2021-11-20 07:26:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 156 states have (on average 1.1794871794871795) internal successors, (184), 156 states have internal predecessors, (184), 68 states have call successors, (68), 23 states have call predecessors, (68), 23 states have return successors, (68), 68 states have call predecessors, (68), 67 states have call successors, (68) [2021-11-20 07:26:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 320 transitions. [2021-11-20 07:26:57,747 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 320 transitions. Word has length 194 [2021-11-20 07:26:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:57,748 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 320 transitions. [2021-11-20 07:26:57,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 9 states have internal predecessors, (89), 4 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-20 07:26:57,749 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 320 transitions. [2021-11-20 07:26:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-20 07:26:57,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:57,753 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:57,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 07:26:57,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:57,969 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:57,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:57,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1760895517, now seen corresponding path program 1 times [2021-11-20 07:26:57,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:57,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459800904] [2021-11-20 07:26:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:57,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:26:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:26:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:26:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:26:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:26:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:26:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:26:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:26:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:26:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:26:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:26:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:26:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:26:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:26:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:26:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 07:26:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 07:26:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 07:26:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 07:26:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:26:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:26:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:26:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-20 07:26:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-20 07:26:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 07:26:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-20 07:26:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-20 07:26:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-11-20 07:26:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-20 07:26:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-11-20 07:26:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-20 07:26:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-20 07:26:58,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:58,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459800904] [2021-11-20 07:26:58,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459800904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:26:58,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220984454] [2021-11-20 07:26:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:58,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:58,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:58,749 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:58,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:26:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:59,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 2566 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 07:26:59,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:00,887 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((aws_hash_table_is_valid_~map.base Int) (aws_hash_table_is_valid_~map.offset Int)) (not (= 0 (select (select |c_#memory_$Pointer$.offset| aws_hash_table_is_valid_~map.base) aws_hash_table_is_valid_~map.offset)))) (exists ((aws_hash_table_is_valid_~map.base Int) (aws_hash_table_is_valid_~map.offset Int)) (not (= (select (select |c_#memory_$Pointer$.base| aws_hash_table_is_valid_~map.base) aws_hash_table_is_valid_~map.offset) 0)))) is different from true [2021-11-20 07:27:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-20 07:27:10,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:27:10,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220984454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:10,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:27:10,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-11-20 07:27:10,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465458247] [2021-11-20 07:27:10,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:10,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:27:10,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:10,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:27:10,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=175, Unknown=3, NotChecked=26, Total=240 [2021-11-20 07:27:10,938 INFO L87 Difference]: Start difference. First operand 248 states and 320 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (31), 2 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-20 07:27:11,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:11,242 INFO L93 Difference]: Finished difference Result 476 states and 619 transitions. [2021-11-20 07:27:11,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:27:11,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (31), 2 states have call predecessors, (31), 3 states have call successors, (31) Word has length 200 [2021-11-20 07:27:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:11,246 INFO L225 Difference]: With dead ends: 476 [2021-11-20 07:27:11,247 INFO L226 Difference]: Without dead ends: 251 [2021-11-20 07:27:11,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=51, Invalid=222, Unknown=3, NotChecked=30, Total=306 [2021-11-20 07:27:11,250 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 5 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 429 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:11,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1668 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 429 Unchecked, 0.2s Time] [2021-11-20 07:27:11,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-20 07:27:11,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2021-11-20 07:27:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 158 states have (on average 1.1772151898734178) internal successors, (186), 157 states have internal predecessors, (186), 68 states have call successors, (68), 24 states have call predecessors, (68), 23 states have return successors, (68), 68 states have call predecessors, (68), 67 states have call successors, (68) [2021-11-20 07:27:11,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 322 transitions. [2021-11-20 07:27:11,282 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 322 transitions. Word has length 200 [2021-11-20 07:27:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:11,284 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 322 transitions. [2021-11-20 07:27:11,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (31), 2 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-20 07:27:11,284 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 322 transitions. [2021-11-20 07:27:11,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-20 07:27:11,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:11,288 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:11,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:11,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:11,503 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:11,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:11,503 INFO L85 PathProgramCache]: Analyzing trace with hash -661330404, now seen corresponding path program 1 times [2021-11-20 07:27:11,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:11,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169800753] [2021-11-20 07:27:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:11,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:11,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:11,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:27:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:11,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:11,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:27:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:11,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:27:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:11,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:11,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:11,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:27:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:11,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:27:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:11,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:27:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:27:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:27:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 07:27:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:27:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 07:27:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 07:27:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-20 07:27:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-20 07:27:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:27:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-20 07:27:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-20 07:27:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-11-20 07:27:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-20 07:27:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-11-20 07:27:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-20 07:27:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-11-20 07:27:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-20 07:27:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2021-11-20 07:27:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2021-11-20 07:27:12,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:12,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169800753] [2021-11-20 07:27:12,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169800753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:12,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:12,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:27:12,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662456558] [2021-11-20 07:27:12,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:12,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:27:12,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:12,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:27:12,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:27:12,423 INFO L87 Difference]: Start difference. First operand 250 states and 322 transitions. Second operand has 9 states, 8 states have (on average 9.0) internal successors, (72), 5 states have internal predecessors, (72), 3 states have call successors, (32), 5 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-20 07:27:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:13,916 INFO L93 Difference]: Finished difference Result 408 states and 531 transitions. [2021-11-20 07:27:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:27:13,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 5 states have internal predecessors, (72), 3 states have call successors, (32), 5 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 205 [2021-11-20 07:27:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:13,921 INFO L225 Difference]: With dead ends: 408 [2021-11-20 07:27:13,922 INFO L226 Difference]: Without dead ends: 262 [2021-11-20 07:27:13,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:27:13,924 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 332 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:13,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 888 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 07:27:13,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-20 07:27:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 252. [2021-11-20 07:27:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 159 states have (on average 1.1761006289308176) internal successors, (187), 159 states have internal predecessors, (187), 68 states have call successors, (68), 24 states have call predecessors, (68), 24 states have return successors, (70), 68 states have call predecessors, (70), 67 states have call successors, (70) [2021-11-20 07:27:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 325 transitions. [2021-11-20 07:27:13,957 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 325 transitions. Word has length 205 [2021-11-20 07:27:13,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:13,958 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 325 transitions. [2021-11-20 07:27:13,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 5 states have internal predecessors, (72), 3 states have call successors, (32), 5 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-20 07:27:13,958 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 325 transitions. [2021-11-20 07:27:13,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-20 07:27:13,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:13,962 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:13,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 07:27:13,963 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:13,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:13,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1796534111, now seen corresponding path program 1 times [2021-11-20 07:27:13,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:13,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629153922] [2021-11-20 07:27:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:13,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:27:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:27:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:27:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:27:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:27:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:27:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:27:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:27:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 07:27:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:27:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 07:27:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 07:27:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-20 07:27:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-20 07:27:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:27:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-20 07:27:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:14,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-20 07:27:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-11-20 07:27:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-20 07:27:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-11-20 07:27:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-20 07:27:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-11-20 07:27:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-20 07:27:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-11-20 07:27:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2021-11-20 07:27:15,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:15,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629153922] [2021-11-20 07:27:15,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629153922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:15,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:15,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 07:27:15,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263913193] [2021-11-20 07:27:15,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:15,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:27:15,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:15,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:27:15,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:27:15,303 INFO L87 Difference]: Start difference. First operand 252 states and 325 transitions. Second operand has 16 states, 14 states have (on average 5.5) internal successors, (77), 12 states have internal predecessors, (77), 6 states have call successors, (33), 6 states have call predecessors, (33), 3 states have return successors, (30), 4 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-20 07:27:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:18,115 INFO L93 Difference]: Finished difference Result 424 states and 554 transitions. [2021-11-20 07:27:18,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:27:18,116 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 5.5) internal successors, (77), 12 states have internal predecessors, (77), 6 states have call successors, (33), 6 states have call predecessors, (33), 3 states have return successors, (30), 4 states have call predecessors, (30), 5 states have call successors, (30) Word has length 210 [2021-11-20 07:27:18,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:18,120 INFO L225 Difference]: With dead ends: 424 [2021-11-20 07:27:18,121 INFO L226 Difference]: Without dead ends: 269 [2021-11-20 07:27:18,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-11-20 07:27:18,123 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 372 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 2148 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 2464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 2148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:18,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1580 Invalid, 2464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 2148 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 07:27:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-20 07:27:18,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 255. [2021-11-20 07:27:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 161 states have (on average 1.173913043478261) internal successors, (189), 162 states have internal predecessors, (189), 68 states have call successors, (68), 24 states have call predecessors, (68), 25 states have return successors, (73), 68 states have call predecessors, (73), 67 states have call successors, (73) [2021-11-20 07:27:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 330 transitions. [2021-11-20 07:27:18,153 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 330 transitions. Word has length 210 [2021-11-20 07:27:18,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:18,154 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 330 transitions. [2021-11-20 07:27:18,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 5.5) internal successors, (77), 12 states have internal predecessors, (77), 6 states have call successors, (33), 6 states have call predecessors, (33), 3 states have return successors, (30), 4 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-20 07:27:18,155 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 330 transitions. [2021-11-20 07:27:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-20 07:27:18,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:18,160 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:18,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 07:27:18,161 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:18,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:18,162 INFO L85 PathProgramCache]: Analyzing trace with hash -130056786, now seen corresponding path program 2 times [2021-11-20 07:27:18,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:18,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278263991] [2021-11-20 07:27:18,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:18,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:27:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:27:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:27:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:27:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:27:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:27:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:27:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:27:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 07:27:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:27:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 07:27:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 07:27:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-20 07:27:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-20 07:27:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:27:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-20 07:27:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-20 07:27:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-11-20 07:27:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-20 07:27:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:19,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-11-20 07:27:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:19,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:27:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:19,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:19,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-11-20 07:27:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:19,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-11-20 07:27:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:19,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-11-20 07:27:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:19,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:19,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-11-20 07:27:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2021-11-20 07:27:19,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:19,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278263991] [2021-11-20 07:27:19,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278263991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:19,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074366412] [2021-11-20 07:27:19,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:27:19,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:19,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:19,422 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:19,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:27:19,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 07:27:19,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:19,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 07:27:19,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-20 07:27:20,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:27:20,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074366412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:20,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:27:20,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2021-11-20 07:27:20,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7482378] [2021-11-20 07:27:20,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:20,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:27:20,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:20,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:27:20,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:20,474 INFO L87 Difference]: Start difference. First operand 255 states and 330 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) [2021-11-20 07:27:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:20,540 INFO L93 Difference]: Finished difference Result 263 states and 337 transitions. [2021-11-20 07:27:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:27:20,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) Word has length 221 [2021-11-20 07:27:20,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:20,545 INFO L225 Difference]: With dead ends: 263 [2021-11-20 07:27:20,546 INFO L226 Difference]: Without dead ends: 261 [2021-11-20 07:27:20,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:27:20,547 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 12 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:20,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1217 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-20 07:27:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 259. [2021-11-20 07:27:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 164 states have (on average 1.170731707317073) internal successors, (192), 165 states have internal predecessors, (192), 68 states have call successors, (68), 25 states have call predecessors, (68), 26 states have return successors, (73), 68 states have call predecessors, (73), 67 states have call successors, (73) [2021-11-20 07:27:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 333 transitions. [2021-11-20 07:27:20,574 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 333 transitions. Word has length 221 [2021-11-20 07:27:20,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:20,576 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 333 transitions. [2021-11-20 07:27:20,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) [2021-11-20 07:27:20,577 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 333 transitions. [2021-11-20 07:27:20,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-20 07:27:20,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:20,580 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:20,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 07:27:20,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:20,801 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:20,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:20,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1053277728, now seen corresponding path program 1 times [2021-11-20 07:27:20,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:20,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544030391] [2021-11-20 07:27:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:20,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:27:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:27:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:27:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:27:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:27:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:27:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:27:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:27:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 07:27:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:27:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 07:27:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 07:27:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-20 07:27:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-20 07:27:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:27:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-20 07:27:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-20 07:27:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-11-20 07:27:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-20 07:27:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-11-20 07:27:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:27:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-11-20 07:27:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-11-20 07:27:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-11-20 07:27:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-11-20 07:27:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2021-11-20 07:27:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:21,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2021-11-20 07:27:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2021-11-20 07:27:22,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:22,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544030391] [2021-11-20 07:27:22,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544030391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:22,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94734806] [2021-11-20 07:27:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:22,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:22,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:22,005 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:22,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:27:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:22,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:27:22,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2021-11-20 07:27:23,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-20 07:27:24,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94734806] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:24,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:24,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 8] total 23 [2021-11-20 07:27:24,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103743033] [2021-11-20 07:27:24,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:24,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:27:24,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:24,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:27:24,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:27:24,133 INFO L87 Difference]: Start difference. First operand 259 states and 333 transitions. Second operand has 5 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2021-11-20 07:27:24,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:24,226 INFO L93 Difference]: Finished difference Result 267 states and 340 transitions. [2021-11-20 07:27:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:27:24,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 234 [2021-11-20 07:27:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:24,233 INFO L225 Difference]: With dead ends: 267 [2021-11-20 07:27:24,234 INFO L226 Difference]: Without dead ends: 265 [2021-11-20 07:27:24,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:27:24,236 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 6 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:24,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1224 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-20 07:27:24,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 263. [2021-11-20 07:27:24,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 167 states have (on average 1.1676646706586826) internal successors, (195), 168 states have internal predecessors, (195), 68 states have call successors, (68), 26 states have call predecessors, (68), 27 states have return successors, (73), 68 states have call predecessors, (73), 67 states have call successors, (73) [2021-11-20 07:27:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 336 transitions. [2021-11-20 07:27:24,272 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 336 transitions. Word has length 234 [2021-11-20 07:27:24,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:24,274 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 336 transitions. [2021-11-20 07:27:24,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2021-11-20 07:27:24,275 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 336 transitions. [2021-11-20 07:27:24,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-20 07:27:24,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:24,279 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:24,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:24,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:27:24,493 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:24,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:24,494 INFO L85 PathProgramCache]: Analyzing trace with hash -2025730660, now seen corresponding path program 1 times [2021-11-20 07:27:24,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:24,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814031322] [2021-11-20 07:27:24,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:24,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:27:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:27:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:27:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:27:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:27:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:27:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:27:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:27:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 07:27:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:27:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:24,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 07:27:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 07:27:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-20 07:27:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-20 07:27:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:27:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-20 07:27:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-20 07:27:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-11-20 07:27:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-20 07:27:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-11-20 07:27:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:27:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-11-20 07:27:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-11-20 07:27:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-11-20 07:27:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 07:27:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-11-20 07:27:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-11-20 07:27:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2021-11-20 07:27:25,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:25,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814031322] [2021-11-20 07:27:25,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814031322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:25,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138520741] [2021-11-20 07:27:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:25,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:25,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:25,695 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:25,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:27:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:26,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 2773 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:27:26,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-20 07:27:27,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:27:27,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138520741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:27,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:27:27,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2021-11-20 07:27:27,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416062924] [2021-11-20 07:27:27,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:27,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:27:27,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:27,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:27:27,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:27:27,022 INFO L87 Difference]: Start difference. First operand 263 states and 336 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 07:27:27,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:27,064 INFO L93 Difference]: Finished difference Result 345 states and 437 transitions. [2021-11-20 07:27:27,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:27:27,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) Word has length 241 [2021-11-20 07:27:27,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:27,070 INFO L225 Difference]: With dead ends: 345 [2021-11-20 07:27:27,070 INFO L226 Difference]: Without dead ends: 272 [2021-11-20 07:27:27,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:27:27,072 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 3 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:27,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1242 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:27:27,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-20 07:27:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 267. [2021-11-20 07:27:27,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 170 states have (on average 1.1647058823529413) internal successors, (198), 171 states have internal predecessors, (198), 68 states have call successors, (68), 26 states have call predecessors, (68), 28 states have return successors, (74), 69 states have call predecessors, (74), 67 states have call successors, (74) [2021-11-20 07:27:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 340 transitions. [2021-11-20 07:27:27,103 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 340 transitions. Word has length 241 [2021-11-20 07:27:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:27,104 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 340 transitions. [2021-11-20 07:27:27,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 07:27:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 340 transitions. [2021-11-20 07:27:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-20 07:27:27,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:27,108 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:27,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:27,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:27,333 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:27,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1682430622, now seen corresponding path program 1 times [2021-11-20 07:27:27,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:27,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515533130] [2021-11-20 07:27:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:27,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:27:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:27:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:27:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:27:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:27:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:27:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:27:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:27:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 07:27:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:27:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 07:27:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 07:27:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-20 07:27:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-20 07:27:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:27,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:27:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-20 07:27:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-20 07:27:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-11-20 07:27:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-20 07:27:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-11-20 07:27:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:27:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-11-20 07:27:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-11-20 07:27:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-11-20 07:27:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 07:27:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-11-20 07:27:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-11-20 07:27:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2021-11-20 07:27:28,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:28,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515533130] [2021-11-20 07:27:28,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515533130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:28,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186812768] [2021-11-20 07:27:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:28,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:28,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:28,596 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:28,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:27:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:29,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 2772 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 07:27:29,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-11-20 07:27:29,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:27:29,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186812768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:29,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:27:29,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 21 [2021-11-20 07:27:29,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970647211] [2021-11-20 07:27:29,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:29,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:27:29,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:29,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:27:29,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:27:29,987 INFO L87 Difference]: Start difference. First operand 267 states and 340 transitions. Second operand has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-20 07:27:30,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:30,227 INFO L93 Difference]: Finished difference Result 443 states and 567 transitions. [2021-11-20 07:27:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:27:30,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 241 [2021-11-20 07:27:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:30,231 INFO L225 Difference]: With dead ends: 443 [2021-11-20 07:27:30,234 INFO L226 Difference]: Without dead ends: 267 [2021-11-20 07:27:30,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:27:30,237 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 2 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:30,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1701 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:27:30,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-20 07:27:30,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2021-11-20 07:27:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 170 states have (on average 1.1647058823529413) internal successors, (198), 171 states have internal predecessors, (198), 68 states have call successors, (68), 26 states have call predecessors, (68), 28 states have return successors, (73), 69 states have call predecessors, (73), 67 states have call successors, (73) [2021-11-20 07:27:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 339 transitions. [2021-11-20 07:27:30,266 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 339 transitions. Word has length 241 [2021-11-20 07:27:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:30,268 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 339 transitions. [2021-11-20 07:27:30,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-20 07:27:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 339 transitions. [2021-11-20 07:27:30,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-20 07:27:30,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:30,272 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:30,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:30,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:27:30,492 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:30,492 INFO L85 PathProgramCache]: Analyzing trace with hash 762116007, now seen corresponding path program 2 times [2021-11-20 07:27:30,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:30,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702931947] [2021-11-20 07:27:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:30,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:32,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:32,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:27:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:32,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:32,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:27:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:32,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:27:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:32,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:32,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:32,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:27:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:32,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:27:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:32,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:27:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:32,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:32,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:27:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:32,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:27:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 07:27:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:27:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 07:27:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 07:27:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-20 07:27:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-20 07:27:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:27:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-20 07:27:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-20 07:27:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:27:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-11-20 07:27:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-20 07:27:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-20 07:27:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:27:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-20 07:27:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2021-11-20 07:27:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-20 07:27:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:27:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 07:27:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:33,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2021-11-20 07:27:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:34,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-11-20 07:27:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2021-11-20 07:27:34,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:34,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702931947] [2021-11-20 07:27:34,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702931947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:34,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235444545] [2021-11-20 07:27:34,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:27:34,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:34,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:34,233 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:34,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:27:34,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:27:34,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:34,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 2826 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 07:27:34,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2021-11-20 07:27:35,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:27:35,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235444545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:35,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:27:35,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [34] total 38 [2021-11-20 07:27:35,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995739347] [2021-11-20 07:27:35,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:35,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:27:35,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:27:35,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 07:27:35,497 INFO L87 Difference]: Start difference. First operand 267 states and 339 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-20 07:27:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:35,757 INFO L93 Difference]: Finished difference Result 527 states and 667 transitions. [2021-11-20 07:27:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:27:35,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 252 [2021-11-20 07:27:35,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:35,762 INFO L225 Difference]: With dead ends: 527 [2021-11-20 07:27:35,762 INFO L226 Difference]: Without dead ends: 269 [2021-11-20 07:27:35,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 329 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 07:27:35,765 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 2 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:35,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1403 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:27:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-20 07:27:35,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-11-20 07:27:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 171 states have (on average 1.1637426900584795) internal successors, (199), 173 states have internal predecessors, (199), 68 states have call successors, (68), 26 states have call predecessors, (68), 29 states have return successors, (74), 69 states have call predecessors, (74), 67 states have call successors, (74) [2021-11-20 07:27:35,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 341 transitions. [2021-11-20 07:27:35,791 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 341 transitions. Word has length 252 [2021-11-20 07:27:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:35,791 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 341 transitions. [2021-11-20 07:27:35,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-20 07:27:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 341 transitions. [2021-11-20 07:27:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-20 07:27:35,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:35,795 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:35,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:36,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:27:36,009 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:36,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:36,010 INFO L85 PathProgramCache]: Analyzing trace with hash 740771300, now seen corresponding path program 1 times [2021-11-20 07:27:36,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:36,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102009123] [2021-11-20 07:27:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:36,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:36,077 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:27:36,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5506099] [2021-11-20 07:27:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:36,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:36,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:36,079 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:36,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:27:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:36,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 2903 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 07:27:36,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-20 07:27:37,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:27:37,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:37,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102009123] [2021-11-20 07:27:37,375 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:27:37,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5506099] [2021-11-20 07:27:37,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5506099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:37,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:37,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:27:37,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997896800] [2021-11-20 07:27:37,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:37,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:27:37,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:37,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:27:37,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:27:37,379 INFO L87 Difference]: Start difference. First operand 269 states and 341 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-20 07:27:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:37,602 INFO L93 Difference]: Finished difference Result 455 states and 582 transitions. [2021-11-20 07:27:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:27:37,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 258 [2021-11-20 07:27:37,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:37,606 INFO L225 Difference]: With dead ends: 455 [2021-11-20 07:27:37,606 INFO L226 Difference]: Without dead ends: 267 [2021-11-20 07:27:37,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:27:37,609 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 2 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:37,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1403 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:27:37,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-20 07:27:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 262. [2021-11-20 07:27:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 166 states have (on average 1.1566265060240963) internal successors, (192), 167 states have internal predecessors, (192), 68 states have call successors, (68), 26 states have call predecessors, (68), 27 states have return successors, (72), 68 states have call predecessors, (72), 67 states have call successors, (72) [2021-11-20 07:27:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 332 transitions. [2021-11-20 07:27:37,633 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 332 transitions. Word has length 258 [2021-11-20 07:27:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:37,634 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 332 transitions. [2021-11-20 07:27:37,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-20 07:27:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 332 transitions. [2021-11-20 07:27:37,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-20 07:27:37,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:37,638 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:37,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:37,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:27:37,853 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:37,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:37,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2044822841, now seen corresponding path program 1 times [2021-11-20 07:27:37,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:37,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621178875] [2021-11-20 07:27:37,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:37,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:37,918 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:27:37,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749914837] [2021-11-20 07:27:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:37,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:37,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:37,920 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:37,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996f6630-1508-4157-8040-5ee7391123d5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:27:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:39,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 2980 conjuncts, 246 conjunts are in the unsatisfiable core [2021-11-20 07:27:39,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:39,307 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 07:27:39,787 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:27:39,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:27:39,859 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:27:39,860 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 18 treesize of output 14 [2021-11-20 07:27:40,555 INFO L354 Elim1Store]: treesize reduction 211, result has 10.2 percent of original size [2021-11-20 07:27:40,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 97 [2021-11-20 07:27:41,304 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-11-20 07:27:41,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 32 treesize of output 40 [2021-11-20 07:27:41,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:27:41,487 INFO L354 Elim1Store]: treesize reduction 66, result has 32.7 percent of original size [2021-11-20 07:27:41,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 31 treesize of output 58 [2021-11-20 07:27:41,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 07:27:41,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2021-11-20 07:27:42,053 INFO L354 Elim1Store]: treesize reduction 156, result has 17.5 percent of original size [2021-11-20 07:27:42,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 75 treesize of output 92 [2021-11-20 07:28:38,321 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 264 treesize of output 196 [2021-11-20 07:28:38,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:38,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:38,466 INFO L354 Elim1Store]: treesize reduction 232, result has 20.8 percent of original size [2021-11-20 07:28:38,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 287 treesize of output 241 [2021-11-20 07:28:38,629 INFO L354 Elim1Store]: treesize reduction 174, result has 19.4 percent of original size [2021-11-20 07:28:38,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 298 treesize of output 326 [2021-11-20 07:28:39,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:28:39,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:39,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:39,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2021-11-20 07:28:39,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:39,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:39,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:28:39,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 26 [2021-11-20 07:28:39,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:39,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:28:39,305 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:28:39,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 38 [2021-11-20 07:33:53,563 INFO L354 Elim1Store]: treesize reduction 92, result has 19.3 percent of original size [2021-11-20 07:33:53,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 100 [2021-11-20 07:38:01,592 INFO L354 Elim1Store]: treesize reduction 369, result has 18.7 percent of original size [2021-11-20 07:38:01,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 121 treesize of output 185