./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8 --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 383b91606ce09b9a994eb030f2dbda7bfbddbf7edfef74a87019ad2186d8765d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 22:12:01,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:12:01,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:12:01,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:12:01,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:12:01,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:12:01,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:12:01,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:12:01,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:12:01,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:12:01,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:12:01,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:12:01,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:12:01,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:12:01,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:12:01,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:12:01,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:12:01,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:12:01,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:12:01,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:12:01,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:12:01,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:12:01,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:12:01,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:12:01,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:12:01,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:12:01,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:12:01,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:12:01,603 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:12:01,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:12:01,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:12:01,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:12:01,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:12:01,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:12:01,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:12:01,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:12:01,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:12:01,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:12:01,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:12:01,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:12:01,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:12:01,608 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-12-13 22:12:01,622 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:12:01,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:12:01,622 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:12:01,622 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:12:01,623 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:12:01,623 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:12:01,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:12:01,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:12:01,624 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:12:01,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:12:01,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:12:01,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:12:01,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 22:12:01,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:12:01,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 22:12:01,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 22:12:01,630 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:12:01,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 22:12:01,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:12:01,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:12:01,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:12:01,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:12:01,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:12:01,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:12:01,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 22:12:01,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:12:01,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:12:01,631 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:12:01,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 22:12:01,632 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:12:01,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:12:01,632 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:12:01,632 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 383b91606ce09b9a994eb030f2dbda7bfbddbf7edfef74a87019ad2186d8765d [2022-12-13 22:12:01,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:12:01,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:12:01,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:12:01,819 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:12:01,819 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:12:01,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i [2022-12-13 22:12:04,481 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:12:04,742 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:12:04,742 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i [2022-12-13 22:12:04,757 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/data/757024152/585259e5e79b4c17b181eb3c02b1ab10/FLAG5de1e73b9 [2022-12-13 22:12:04,770 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/data/757024152/585259e5e79b4c17b181eb3c02b1ab10 [2022-12-13 22:12:04,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:12:04,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:12:04,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:12:04,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:12:04,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:12:04,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:12:04" (1/1) ... [2022-12-13 22:12:04,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63e8dcea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:12:04, skipping insertion in model container [2022-12-13 22:12:04,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:12:04" (1/1) ... [2022-12-13 22:12:04,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:12:04,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:12:05,039 WARN L237 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_7da38090-4d38-46e9-9d6c-032d684df7ac/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i[4494,4507] [2022-12-13 22:12:05,044 WARN L237 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_7da38090-4d38-46e9-9d6c-032d684df7ac/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i[4554,4567] [2022-12-13 22:12:05,512 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 22:12:05,517 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,518 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,518 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,519 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,520 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,530 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,530 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,532 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,532 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,534 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,534 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,535 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,535 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,583 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 22:12:05,583 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 22:12:05,584 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 22:12:05,587 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 22:12:05,589 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 22:12:05,589 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 22:12:05,783 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 22:12:05,784 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 22:12:05,785 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 22:12:05,786 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 22:12:05,787 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 22:12:05,788 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 22:12:05,789 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 22:12:05,789 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 22:12:05,790 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 22:12:05,791 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 22:12:05,792 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 22:12:05,892 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 22:12:05,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:12:05,919 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:12:05,928 WARN L237 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_7da38090-4d38-46e9-9d6c-032d684df7ac/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i[4494,4507] [2022-12-13 22:12:05,928 WARN L237 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_7da38090-4d38-46e9-9d6c-032d684df7ac/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i[4554,4567] [2022-12-13 22:12:05,953 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 22:12:05,955 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,955 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,956 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,956 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,957 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,962 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,962 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,963 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,963 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,964 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,965 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,965 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,965 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 22:12:05,970 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 22:12:05,970 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 22:12:05,971 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 22:12:05,973 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 22:12:05,974 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 22:12:05,974 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 22:12:05,990 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 22:12:05,990 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 22:12:05,991 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 22:12:05,992 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 22:12:05,992 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 22:12:05,993 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 22:12:05,993 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 22:12:05,993 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 22:12:05,994 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 22:12:05,994 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 22:12:05,994 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 22:12:06,015 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 22:12:06,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:12:06,191 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:12:06,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:12:06 WrapperNode [2022-12-13 22:12:06,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:12:06,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:12:06,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:12:06,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:12:06,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:12:06" (1/1) ... [2022-12-13 22:12:06,246 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:12:06" (1/1) ... [2022-12-13 22:12:06,274 INFO L138 Inliner]: procedures = 679, calls = 1035, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 92 [2022-12-13 22:12:06,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:12:06,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:12:06,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:12:06,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:12:06,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:12:06" (1/1) ... [2022-12-13 22:12:06,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:12:06" (1/1) ... [2022-12-13 22:12:06,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:12:06" (1/1) ... [2022-12-13 22:12:06,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:12:06" (1/1) ... [2022-12-13 22:12:06,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:12:06" (1/1) ... [2022-12-13 22:12:06,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:12:06" (1/1) ... [2022-12-13 22:12:06,306 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:12:06" (1/1) ... [2022-12-13 22:12:06,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:12:06" (1/1) ... [2022-12-13 22:12:06,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:12:06,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:12:06,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:12:06,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:12:06,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:12:06" (1/1) ... [2022-12-13 22:12:06,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:12:06,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:12:06,343 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:12:06,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:12:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2022-12-13 22:12:06,373 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2022-12-13 22:12:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 22:12:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 22:12:06,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 22:12:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-13 22:12:06,373 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-13 22:12:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-13 22:12:06,374 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-13 22:12:06,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:12:06,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 22:12:06,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:12:06,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:12:06,374 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-12-13 22:12:06,374 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-12-13 22:12:06,374 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 22:12:06,374 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 22:12:06,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 22:12:06,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 22:12:06,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 22:12:06,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:12:06,542 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:12:06,544 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:12:06,716 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:12:06,722 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:12:06,722 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 22:12:06,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:12:06 BoogieIcfgContainer [2022-12-13 22:12:06,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:12:06,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:12:06,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:12:06,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:12:06,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:12:04" (1/3) ... [2022-12-13 22:12:06,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5988f140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:12:06, skipping insertion in model container [2022-12-13 22:12:06,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:12:06" (2/3) ... [2022-12-13 22:12:06,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5988f140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:12:06, skipping insertion in model container [2022-12-13 22:12:06,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:12:06" (3/3) ... [2022-12-13 22:12:06,732 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_init_harness_negated.i [2022-12-13 22:12:06,750 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:12:06,750 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 22:12:06,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:12:06,799 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7db5f0ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:12:06,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 22:12:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 44 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 22:12:06,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 22:12:06,809 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:06,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:12:06,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:06,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1017333715, now seen corresponding path program 1 times [2022-12-13 22:12:06,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:06,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2870467] [2022-12-13 22:12:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:06,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:07,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:07,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:07,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:07,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2870467] [2022-12-13 22:12:07,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2870467] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:12:07,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:12:07,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:12:07,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840080136] [2022-12-13 22:12:07,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:07,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 22:12:07,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:07,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 22:12:07,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 22:12:07,123 INFO L87 Difference]: Start difference. First operand has 61 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 44 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 22:12:07,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:07,144 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2022-12-13 22:12:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 22:12:07,145 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-12-13 22:12:07,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:07,151 INFO L225 Difference]: With dead ends: 117 [2022-12-13 22:12:07,151 INFO L226 Difference]: Without dead ends: 56 [2022-12-13 22:12:07,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 22:12:07,156 INFO L413 NwaCegarLoop]: 75 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, 75 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 [2022-12-13 22:12:07,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:12:07,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-13 22:12:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-12-13 22:12:07,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 40 states have internal predecessors, (51), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 22:12:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-12-13 22:12:07,186 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 26 [2022-12-13 22:12:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:07,186 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-12-13 22:12:07,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 22:12:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-12-13 22:12:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 22:12:07,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:07,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:12:07,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:12:07,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:07,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:07,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1834982165, now seen corresponding path program 1 times [2022-12-13 22:12:07,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:07,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559416669] [2022-12-13 22:12:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:07,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:07,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:07,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:07,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:07,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559416669] [2022-12-13 22:12:07,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559416669] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:12:07,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:12:07,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 22:12:07,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363043840] [2022-12-13 22:12:07,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:07,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 22:12:07,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:07,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 22:12:07,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:12:07,534 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:12:07,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:07,586 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2022-12-13 22:12:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:12:07,586 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-12-13 22:12:07,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:07,589 INFO L225 Difference]: With dead ends: 66 [2022-12-13 22:12:07,589 INFO L226 Difference]: Without dead ends: 64 [2022-12-13 22:12:07,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:12:07,590 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 5 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:07,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 329 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:12:07,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-13 22:12:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-12-13 22:12:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 45 states have internal predecessors, (55), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-13 22:12:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2022-12-13 22:12:07,601 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 26 [2022-12-13 22:12:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:07,602 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2022-12-13 22:12:07,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:12:07,602 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2022-12-13 22:12:07,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 22:12:07,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:07,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:12:07,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 22:12:07,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:07,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:07,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1687611897, now seen corresponding path program 1 times [2022-12-13 22:12:07,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:07,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722481388] [2022-12-13 22:12:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:07,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:07,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:07,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:07,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:07,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722481388] [2022-12-13 22:12:07,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722481388] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:12:07,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:12:07,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 22:12:07,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622905265] [2022-12-13 22:12:07,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:07,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 22:12:07,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:07,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 22:12:07,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 22:12:07,887 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:12:08,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:08,015 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2022-12-13 22:12:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 22:12:08,016 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-12-13 22:12:08,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:08,017 INFO L225 Difference]: With dead ends: 135 [2022-12-13 22:12:08,017 INFO L226 Difference]: Without dead ends: 84 [2022-12-13 22:12:08,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 22:12:08,019 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 52 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:08,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 370 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:12:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-13 22:12:08,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2022-12-13 22:12:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 53 states have internal predecessors, (67), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-13 22:12:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2022-12-13 22:12:08,030 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 28 [2022-12-13 22:12:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:08,030 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2022-12-13 22:12:08,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:12:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2022-12-13 22:12:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 22:12:08,031 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:08,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:12:08,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 22:12:08,031 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:08,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:08,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1586287045, now seen corresponding path program 1 times [2022-12-13 22:12:08,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:08,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269034506] [2022-12-13 22:12:08,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:08,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:08,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:08,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269034506] [2022-12-13 22:12:08,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269034506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:12:08,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:12:08,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 22:12:08,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695856063] [2022-12-13 22:12:08,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:08,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:12:08,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:08,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:12:08,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:12:08,173 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:12:08,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:08,249 INFO L93 Difference]: Finished difference Result 140 states and 182 transitions. [2022-12-13 22:12:08,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:12:08,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-12-13 22:12:08,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:08,250 INFO L225 Difference]: With dead ends: 140 [2022-12-13 22:12:08,250 INFO L226 Difference]: Without dead ends: 76 [2022-12-13 22:12:08,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-13 22:12:08,251 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 22 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:08,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 408 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:12:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-13 22:12:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2022-12-13 22:12:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 53 states have internal predecessors, (66), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-13 22:12:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2022-12-13 22:12:08,256 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 28 [2022-12-13 22:12:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:08,257 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2022-12-13 22:12:08,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:12:08,257 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2022-12-13 22:12:08,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 22:12:08,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:08,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:12:08,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 22:12:08,258 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:08,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:08,258 INFO L85 PathProgramCache]: Analyzing trace with hash 575169795, now seen corresponding path program 1 times [2022-12-13 22:12:08,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:08,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169023360] [2022-12-13 22:12:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:08,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:08,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:08,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169023360] [2022-12-13 22:12:08,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169023360] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:12:08,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:12:08,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 22:12:08,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408775821] [2022-12-13 22:12:08,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:08,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:12:08,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:08,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:12:08,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:12:08,370 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:12:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:08,463 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2022-12-13 22:12:08,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:12:08,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-12-13 22:12:08,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:08,465 INFO L225 Difference]: With dead ends: 143 [2022-12-13 22:12:08,465 INFO L226 Difference]: Without dead ends: 79 [2022-12-13 22:12:08,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-13 22:12:08,467 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 16 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:08,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 381 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:12:08,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-13 22:12:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2022-12-13 22:12:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 55 states have internal predecessors, (67), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-13 22:12:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2022-12-13 22:12:08,476 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 28 [2022-12-13 22:12:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:08,476 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2022-12-13 22:12:08,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:12:08,477 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2022-12-13 22:12:08,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 22:12:08,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:08,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:12:08,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 22:12:08,478 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:08,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:08,478 INFO L85 PathProgramCache]: Analyzing trace with hash 833335233, now seen corresponding path program 1 times [2022-12-13 22:12:08,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:08,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373958109] [2022-12-13 22:12:08,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:08,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:08,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:08,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373958109] [2022-12-13 22:12:08,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373958109] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:12:08,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:12:08,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 22:12:08,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545955521] [2022-12-13 22:12:08,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:08,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:12:08,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:08,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:12:08,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:12:08,605 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:12:08,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:08,682 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-12-13 22:12:08,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:12:08,682 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-12-13 22:12:08,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:08,683 INFO L225 Difference]: With dead ends: 142 [2022-12-13 22:12:08,683 INFO L226 Difference]: Without dead ends: 76 [2022-12-13 22:12:08,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-13 22:12:08,685 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 10 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:08,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 342 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:12:08,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-13 22:12:08,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2022-12-13 22:12:08,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-13 22:12:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-12-13 22:12:08,691 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 28 [2022-12-13 22:12:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:08,691 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-12-13 22:12:08,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:12:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-12-13 22:12:08,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 22:12:08,692 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:08,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:12:08,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 22:12:08,692 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:08,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1850407916, now seen corresponding path program 1 times [2022-12-13 22:12:08,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:08,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486038849] [2022-12-13 22:12:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:08,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:08,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:08,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486038849] [2022-12-13 22:12:08,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486038849] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:12:08,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:12:08,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 22:12:08,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410380317] [2022-12-13 22:12:08,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:08,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 22:12:08,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:08,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 22:12:08,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:12:08,808 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:12:08,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:08,870 INFO L93 Difference]: Finished difference Result 133 states and 162 transitions. [2022-12-13 22:12:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:12:08,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-12-13 22:12:08,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:08,872 INFO L225 Difference]: With dead ends: 133 [2022-12-13 22:12:08,872 INFO L226 Difference]: Without dead ends: 75 [2022-12-13 22:12:08,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:12:08,873 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 15 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:08,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 274 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:12:08,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-13 22:12:08,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-12-13 22:12:08,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 53 states have internal predecessors, (62), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-13 22:12:08,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-12-13 22:12:08,879 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 30 [2022-12-13 22:12:08,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:08,879 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-12-13 22:12:08,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:12:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-12-13 22:12:08,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 22:12:08,880 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:08,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:12:08,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 22:12:08,880 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:08,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:08,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1395309347, now seen corresponding path program 1 times [2022-12-13 22:12:08,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:08,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315175931] [2022-12-13 22:12:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:08,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:08,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:08,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315175931] [2022-12-13 22:12:08,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315175931] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:12:08,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:12:08,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 22:12:08,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299061091] [2022-12-13 22:12:08,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:08,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 22:12:08,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:08,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 22:12:08,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:12:08,996 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:12:09,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:09,060 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2022-12-13 22:12:09,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:12:09,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-12-13 22:12:09,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:09,062 INFO L225 Difference]: With dead ends: 136 [2022-12-13 22:12:09,062 INFO L226 Difference]: Without dead ends: 77 [2022-12-13 22:12:09,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:12:09,063 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 12 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:09,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 284 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:12:09,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-13 22:12:09,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2022-12-13 22:12:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 54 states have internal predecessors, (63), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-13 22:12:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-12-13 22:12:09,069 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 31 [2022-12-13 22:12:09,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:09,069 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-12-13 22:12:09,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 22:12:09,069 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-12-13 22:12:09,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 22:12:09,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:09,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:12:09,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 22:12:09,073 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:09,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:09,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1854431003, now seen corresponding path program 1 times [2022-12-13 22:12:09,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:09,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064193504] [2022-12-13 22:12:09,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:09,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:09,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:09,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:09,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 22:12:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:09,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:09,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064193504] [2022-12-13 22:12:09,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064193504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:12:09,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:12:09,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 22:12:09,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11364898] [2022-12-13 22:12:09,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:09,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:12:09,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:09,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:12:09,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:12:09,254 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 22:12:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:09,305 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2022-12-13 22:12:09,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:12:09,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-12-13 22:12:09,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:09,306 INFO L225 Difference]: With dead ends: 83 [2022-12-13 22:12:09,306 INFO L226 Difference]: Without dead ends: 81 [2022-12-13 22:12:09,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-13 22:12:09,307 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 7 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:09,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 395 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:12:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-13 22:12:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2022-12-13 22:12:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-13 22:12:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-12-13 22:12:09,315 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 39 [2022-12-13 22:12:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:09,316 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-12-13 22:12:09,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 22:12:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-12-13 22:12:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 22:12:09,318 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:09,318 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 22:12:09,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 22:12:09,318 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:09,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:09,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1138780288, now seen corresponding path program 1 times [2022-12-13 22:12:09,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:09,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678947167] [2022-12-13 22:12:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:09,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:09,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:09,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:09,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 22:12:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:09,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 22:12:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:09,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 22:12:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 22:12:09,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:09,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678947167] [2022-12-13 22:12:09,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678947167] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:12:09,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:12:09,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 22:12:09,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081721498] [2022-12-13 22:12:09,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:09,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 22:12:09,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:09,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 22:12:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 22:12:09,762 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 9 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 22:12:09,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:09,906 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2022-12-13 22:12:09,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 22:12:09,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2022-12-13 22:12:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:09,907 INFO L225 Difference]: With dead ends: 140 [2022-12-13 22:12:09,907 INFO L226 Difference]: Without dead ends: 75 [2022-12-13 22:12:09,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-13 22:12:09,908 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 27 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:09,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 314 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:12:09,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-13 22:12:09,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-12-13 22:12:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 57 states have internal predecessors, (65), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-12-13 22:12:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2022-12-13 22:12:09,917 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 42 [2022-12-13 22:12:09,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:09,917 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2022-12-13 22:12:09,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 22:12:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2022-12-13 22:12:09,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 22:12:09,918 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:09,918 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 22:12:09,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 22:12:09,919 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:09,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1272793794, now seen corresponding path program 1 times [2022-12-13 22:12:09,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:09,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038028275] [2022-12-13 22:12:09,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:09,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:10,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:10,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:10,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 22:12:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:10,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 22:12:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:10,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 22:12:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 22:12:10,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:10,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038028275] [2022-12-13 22:12:10,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038028275] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:12:10,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:12:10,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 22:12:10,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455550488] [2022-12-13 22:12:10,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:10,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 22:12:10,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:10,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 22:12:10,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-13 22:12:10,313 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 22:12:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:10,504 INFO L93 Difference]: Finished difference Result 145 states and 170 transitions. [2022-12-13 22:12:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 22:12:10,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2022-12-13 22:12:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:10,505 INFO L225 Difference]: With dead ends: 145 [2022-12-13 22:12:10,505 INFO L226 Difference]: Without dead ends: 78 [2022-12-13 22:12:10,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-12-13 22:12:10,506 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:10,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 398 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:12:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-13 22:12:10,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-12-13 22:12:10,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.2) internal successors, (66), 58 states have internal predecessors, (66), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-12-13 22:12:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2022-12-13 22:12:10,515 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 42 [2022-12-13 22:12:10,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:10,515 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2022-12-13 22:12:10,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 22:12:10,516 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2022-12-13 22:12:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 22:12:10,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:10,517 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 22:12:10,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 22:12:10,517 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:10,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1210754180, now seen corresponding path program 1 times [2022-12-13 22:12:10,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:10,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093812656] [2022-12-13 22:12:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:10,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:10,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:10,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:10,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 22:12:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:10,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 22:12:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:10,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 22:12:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 22:12:10,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:10,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093812656] [2022-12-13 22:12:10,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093812656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:12:10,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:12:10,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 22:12:10,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804252546] [2022-12-13 22:12:10,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:10,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 22:12:10,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:10,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 22:12:10,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-13 22:12:10,884 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 22:12:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:11,075 INFO L93 Difference]: Finished difference Result 149 states and 174 transitions. [2022-12-13 22:12:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 22:12:11,075 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2022-12-13 22:12:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:11,076 INFO L225 Difference]: With dead ends: 149 [2022-12-13 22:12:11,076 INFO L226 Difference]: Without dead ends: 81 [2022-12-13 22:12:11,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-13 22:12:11,077 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 39 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:11,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 366 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:12:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-13 22:12:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2022-12-13 22:12:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 60 states have internal predecessors, (68), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-12-13 22:12:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2022-12-13 22:12:11,083 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 42 [2022-12-13 22:12:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:11,083 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2022-12-13 22:12:11,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 22:12:11,083 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2022-12-13 22:12:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 22:12:11,084 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:11,084 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 22:12:11,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 22:12:11,084 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:11,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1720227270, now seen corresponding path program 1 times [2022-12-13 22:12:11,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:11,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441953160] [2022-12-13 22:12:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:11,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 22:12:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 22:12:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 22:12:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 22:12:11,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:11,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441953160] [2022-12-13 22:12:11,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441953160] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:12:11,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:12:11,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 22:12:11,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151701085] [2022-12-13 22:12:11,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:11,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 22:12:11,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:11,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 22:12:11,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-13 22:12:11,299 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 22:12:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:11,467 INFO L93 Difference]: Finished difference Result 155 states and 180 transitions. [2022-12-13 22:12:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 22:12:11,467 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2022-12-13 22:12:11,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:11,468 INFO L225 Difference]: With dead ends: 155 [2022-12-13 22:12:11,468 INFO L226 Difference]: Without dead ends: 85 [2022-12-13 22:12:11,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-12-13 22:12:11,468 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 50 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:11,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 377 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:12:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-13 22:12:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2022-12-13 22:12:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 62 states have internal predecessors, (70), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-12-13 22:12:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2022-12-13 22:12:11,473 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 42 [2022-12-13 22:12:11,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:11,473 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2022-12-13 22:12:11,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 22:12:11,473 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2022-12-13 22:12:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 22:12:11,474 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:11,474 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 22:12:11,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 22:12:11,474 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:11,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1697595016, now seen corresponding path program 1 times [2022-12-13 22:12:11,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:11,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957448876] [2022-12-13 22:12:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:11,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 22:12:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 22:12:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 22:12:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 22:12:11,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:11,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957448876] [2022-12-13 22:12:11,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957448876] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:12:11,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:12:11,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 22:12:11,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501150673] [2022-12-13 22:12:11,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:11,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:12:11,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:11,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:12:11,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:12:11,599 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 22:12:11,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:11,659 INFO L93 Difference]: Finished difference Result 154 states and 179 transitions. [2022-12-13 22:12:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 22:12:11,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2022-12-13 22:12:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:11,660 INFO L225 Difference]: With dead ends: 154 [2022-12-13 22:12:11,660 INFO L226 Difference]: Without dead ends: 73 [2022-12-13 22:12:11,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 22:12:11,661 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 8 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:11,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 310 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:12:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-13 22:12:11,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-12-13 22:12:11,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 55 states have internal predecessors, (62), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-12-13 22:12:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2022-12-13 22:12:11,666 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 42 [2022-12-13 22:12:11,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:11,666 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2022-12-13 22:12:11,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 22:12:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2022-12-13 22:12:11,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 22:12:11,667 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:11,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:12:11,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 22:12:11,667 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:11,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:11,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1045188466, now seen corresponding path program 1 times [2022-12-13 22:12:11,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:11,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037221021] [2022-12-13 22:12:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:11,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 22:12:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:11,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:11,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037221021] [2022-12-13 22:12:11,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037221021] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:12:11,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402750986] [2022-12-13 22:12:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:11,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:12:11,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:12:11,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:12:11,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 22:12:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:12,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 22:12:12,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:12:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:12,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:12:12,655 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 22:12:12,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-12-13 22:12:12,664 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 22:12:12,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2022-12-13 22:12:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:12,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402750986] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 22:12:12,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:12:12,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 11] total 23 [2022-12-13 22:12:12,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036639834] [2022-12-13 22:12:12,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:12:12,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 22:12:12,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:12,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 22:12:12,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-12-13 22:12:12,677 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 22:12:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:12,850 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2022-12-13 22:12:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:12:12,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2022-12-13 22:12:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:12,851 INFO L225 Difference]: With dead ends: 146 [2022-12-13 22:12:12,851 INFO L226 Difference]: Without dead ends: 85 [2022-12-13 22:12:12,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-12-13 22:12:12,852 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 25 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:12,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 329 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:12:12,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-13 22:12:12,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-12-13 22:12:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 59 states have internal predecessors, (67), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2022-12-13 22:12:12,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2022-12-13 22:12:12,858 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 41 [2022-12-13 22:12:12,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:12,858 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2022-12-13 22:12:12,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 22:12:12,858 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2022-12-13 22:12:12,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 22:12:12,858 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:12,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:12:12,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:12:13,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:12:13,060 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:13,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:13,061 INFO L85 PathProgramCache]: Analyzing trace with hash 34071216, now seen corresponding path program 1 times [2022-12-13 22:12:13,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:13,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589214422] [2022-12-13 22:12:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:13,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:13,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 22:12:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:13,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 22:12:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:13,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 22:12:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:13,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:12:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589214422] [2022-12-13 22:12:13,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589214422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:12:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657662790] [2022-12-13 22:12:13,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:13,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:12:13,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:12:13,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:12:13,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 22:12:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:12:13,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 22:12:13,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:12:15,789 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_3| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_2| Int)) (not (= 0 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_3|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_2|)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_3| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_2| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_3|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_2|) 0)))) is different from true [2022-12-13 22:12:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:15,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:12:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:12:16,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657662790] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:12:16,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:12:16,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 20 [2022-12-13 22:12:16,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478382236] [2022-12-13 22:12:16,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:12:16,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 22:12:16,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:12:16,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 22:12:16,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=295, Unknown=1, NotChecked=34, Total=380 [2022-12-13 22:12:16,052 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 19 states have internal predecessors, (56), 7 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 22:12:16,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:16,540 INFO L93 Difference]: Finished difference Result 179 states and 222 transitions. [2022-12-13 22:12:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 22:12:16,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 19 states have internal predecessors, (56), 7 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2022-12-13 22:12:16,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:16,541 INFO L225 Difference]: With dead ends: 179 [2022-12-13 22:12:16,541 INFO L226 Difference]: Without dead ends: 113 [2022-12-13 22:12:16,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=122, Invalid=583, Unknown=1, NotChecked=50, Total=756 [2022-12-13 22:12:16,542 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 247 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 53 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:16,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 483 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 386 Invalid, 3 Unknown, 146 Unchecked, 0.3s Time] [2022-12-13 22:12:16,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-13 22:12:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2022-12-13 22:12:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 66 states have internal predecessors, (75), 12 states have call successors, (12), 8 states have call predecessors, (12), 11 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-12-13 22:12:16,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2022-12-13 22:12:16,549 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 41 [2022-12-13 22:12:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:16,550 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2022-12-13 22:12:16,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 19 states have internal predecessors, (56), 7 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 22:12:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2022-12-13 22:12:16,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 22:12:16,550 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:16,550 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:12:16,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 22:12:16,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 22:12:16,751 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:16,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:16,752 INFO L85 PathProgramCache]: Analyzing trace with hash 964483973, now seen corresponding path program 1 times [2022-12-13 22:12:16,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:16,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260259861] [2022-12-13 22:12:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:16,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:12:16,791 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 22:12:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:12:16,831 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 22:12:16,831 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 22:12:16,832 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-13 22:12:16,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 22:12:16,836 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:12:16,840 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 22:12:16,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 10:12:16 BoogieIcfgContainer [2022-12-13 22:12:16,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 22:12:16,876 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 22:12:16,876 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 22:12:16,876 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 22:12:16,876 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:12:06" (3/4) ... [2022-12-13 22:12:16,878 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-13 22:12:16,911 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 22:12:16,912 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 22:12:16,912 INFO L158 Benchmark]: Toolchain (without parser) took 12138.27ms. Allocated memory was 113.2MB in the beginning and 285.2MB in the end (delta: 172.0MB). Free memory was 66.9MB in the beginning and 122.5MB in the end (delta: -55.7MB). Peak memory consumption was 118.4MB. Max. memory is 16.1GB. [2022-12-13 22:12:16,912 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 113.2MB. Free memory is still 85.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 22:12:16,913 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1416.30ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 66.6MB in the beginning and 87.4MB in the end (delta: -20.8MB). Peak memory consumption was 65.9MB. Max. memory is 16.1GB. [2022-12-13 22:12:16,913 INFO L158 Benchmark]: Boogie Procedure Inliner took 82.61ms. Allocated memory is still 136.3MB. Free memory was 87.4MB in the beginning and 82.7MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-13 22:12:16,913 INFO L158 Benchmark]: Boogie Preprocessor took 37.32ms. Allocated memory is still 136.3MB. Free memory was 82.7MB in the beginning and 79.8MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-13 22:12:16,914 INFO L158 Benchmark]: RCFGBuilder took 411.53ms. Allocated memory is still 136.3MB. Free memory was 79.8MB in the beginning and 58.9MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-12-13 22:12:16,914 INFO L158 Benchmark]: TraceAbstraction took 10148.36ms. Allocated memory was 136.3MB in the beginning and 285.2MB in the end (delta: 148.9MB). Free memory was 58.1MB in the beginning and 125.7MB in the end (delta: -67.6MB). Peak memory consumption was 81.8MB. Max. memory is 16.1GB. [2022-12-13 22:12:16,914 INFO L158 Benchmark]: Witness Printer took 36.11ms. Allocated memory is still 285.2MB. Free memory was 125.7MB in the beginning and 122.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 22:12:16,916 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 113.2MB. Free memory is still 85.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1416.30ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 66.6MB in the beginning and 87.4MB in the end (delta: -20.8MB). Peak memory consumption was 65.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 82.61ms. Allocated memory is still 136.3MB. Free memory was 87.4MB in the beginning and 82.7MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.32ms. Allocated memory is still 136.3MB. Free memory was 82.7MB in the beginning and 79.8MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 411.53ms. Allocated memory is still 136.3MB. Free memory was 79.8MB in the beginning and 58.9MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 10148.36ms. Allocated memory was 136.3MB in the beginning and 285.2MB in the end (delta: 148.9MB). Free memory was 58.1MB in the beginning and 125.7MB in the end (delta: -67.6MB). Peak memory consumption was 81.8MB. Max. memory is 16.1GB. * Witness Printer took 36.11ms. Allocated memory is still 285.2MB. Free memory was 125.7MB in the beginning and 122.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 223]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L6913-L6918] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L7358] static __thread int tl_last_error = 0; VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7387] CALL aws_linked_list_init_harness() [L7376] struct aws_linked_list list; VAL [list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7382] CALL aws_linked_list_init(&list) VAL [list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4771] CALL assume_abort_if_not((list)) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4771] RET assume_abort_if_not((list)) VAL [list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4772] list->head.next = &list->tail [L4773-L4774] list->head.prev = ((void *)0) [L4776] list->tail.prev = &list->head [L4777-L4778] list->tail.next = ((void *)0) VAL [list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4780] CALL, EXPR aws_linked_list_is_valid(list) VAL [list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next VAL [list={6:0}, list={6:0}, list && list->head.next=1, list->head.next={6:16}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) VAL [list={6:0}, list={6:0}, list && list->head.next=1, list && list->head.next && list->head.prev == ((void *)0)=1, list->head.next={6:16}, list->head.prev={0:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev VAL [list={6:0}, list={6:0}, list && list->head.next=1, list && list->head.next && list->head.prev == ((void *)0)=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev=1, list->head.next={6:16}, list->head.prev={0:0}, list->tail.prev={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [list={6:0}, list={6:0}, list && list->head.next=1, list && list->head.next && list->head.prev == ((void *)0)=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0)=1, list->head.next={6:16}, list->head.prev={0:0}, list->tail.next={0:0}, list->tail.prev={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4751] COND FALSE !(temp == &list->tail) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) VAL [node={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next VAL [node={6:0}, node={6:0}, node && node->next=1, node->next={6:16}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node VAL [node={6:0}, node={6:0}, node && node->next=1, node && node->next && node->next->prev == node=1, node->next={6:16}, node->next={6:16}, node->next->prev={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) VAL [aws_linked_list_node_next_is_valid(temp)=1, head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 VAL [head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4764] return head_reaches_tail; VAL [\result=1, head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L4780] RET, EXPR aws_linked_list_is_valid(list) VAL [aws_linked_list_is_valid(list)=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4780] CALL __VERIFIER_assert(!((aws_linked_list_is_valid(list)))) VAL [\old(cond)=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L223] COND TRUE !cond VAL [\old(cond)=0, cond=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L223] reach_error() VAL [\old(cond)=0, cond=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.1s, OverallIterations: 17, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 609 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 571 mSDsluCounter, 5435 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 146 IncrementalHoareTripleChecker+Unchecked, 4368 mSDsCounter, 175 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1586 IncrementalHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 175 mSolverCounterUnsat, 1067 mSDtfsCounter, 1586 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 439 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=16, InterpolantAutomatonStates: 131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 92 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 680 NumberOfCodeBlocks, 680 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 700 ConstructedInterpolants, 9 QuantifiedInterpolants, 2998 SizeOfPredicates, 23 NumberOfNonLiveVariables, 507 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 20 InterpolantComputations, 15 PerfectInterpolantSequences, 31/36 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-13 22:12:16,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da38090-4d38-46e9-9d6c-032d684df7ac/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE