./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_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_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/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_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/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_0a271723-eafa-45a3-bf00-051795c92b99/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 f77b746008f8945d6b8e05796af79a5acefb89d87a5a0c6bf7d985df753c1b0e --- 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 19:12:21,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:12:21,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:12:21,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:12:21,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:12:21,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:12:21,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:12:21,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:12:21,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:12:21,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:12:21,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:12:21,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:12:21,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:12:21,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:12:21,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:12:21,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:12:21,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:12:21,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:12:21,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:12:21,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:12:21,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:12:21,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:12:21,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:12:21,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:12:21,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:12:21,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:12:21,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:12:21,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:12:21,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:12:21,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:12:21,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:12:21,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:12:21,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:12:21,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:12:21,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:12:21,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:12:21,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:12:21,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:12:21,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:12:21,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:12:21,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:12:21,995 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-12-13 19:12:22,009 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:12:22,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:12:22,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:12:22,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:12:22,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:12:22,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:12:22,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:12:22,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:12:22,019 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:12:22,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:12:22,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:12:22,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:12:22,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 19:12:22,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:12:22,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 19:12:22,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 19:12:22,020 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:12:22,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 19:12:22,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:12:22,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:12:22,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:12:22,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:12:22,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:12:22,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:12:22,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 19:12:22,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:12:22,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:12:22,023 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:12:22,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 19:12:22,023 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:12:22,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:12:22,023 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:12:22,023 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_0a271723-eafa-45a3-bf00-051795c92b99/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f77b746008f8945d6b8e05796af79a5acefb89d87a5a0c6bf7d985df753c1b0e [2022-12-13 19:12:22,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:12:22,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:12:22,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:12:22,224 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:12:22,225 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:12:22,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i [2022-12-13 19:12:24,736 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:12:25,007 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:12:25,007 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i [2022-12-13 19:12:25,022 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/data/77f8f42c0/6482590463574286903c4d1801333b75/FLAGef80be118 [2022-12-13 19:12:25,342 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/data/77f8f42c0/6482590463574286903c4d1801333b75 [2022-12-13 19:12:25,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:12:25,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:12:25,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:12:25,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:12:25,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:12:25,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:12:25" (1/1) ... [2022-12-13 19:12:25,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fbe0293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:25, skipping insertion in model container [2022-12-13 19:12:25,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:12:25" (1/1) ... [2022-12-13 19:12:25,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:12:25,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:12:25,587 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_0a271723-eafa-45a3-bf00-051795c92b99/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4494,4507] [2022-12-13 19:12:25,593 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_0a271723-eafa-45a3-bf00-051795c92b99/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4554,4567] [2022-12-13 19:12:26,163 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 19:12:26,168 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,169 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,169 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,170 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,171 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,181 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,182 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,183 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,184 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,185 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,186 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,186 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,187 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,238 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 19:12:26,238 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 19:12:26,239 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 19:12:26,242 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 19:12:26,244 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 19:12:26,244 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 19:12:26,472 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 19:12:26,473 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 19:12:26,474 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 19:12:26,475 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 19:12:26,475 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 19:12:26,477 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 19:12:26,477 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 19:12:26,478 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 19:12:26,478 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 19:12:26,478 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 19:12:26,479 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 19:12:26,588 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 19:12:26,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:12:26,634 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:12:26,656 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_0a271723-eafa-45a3-bf00-051795c92b99/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4494,4507] [2022-12-13 19:12:26,657 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_0a271723-eafa-45a3-bf00-051795c92b99/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4554,4567] [2022-12-13 19:12:26,696 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 19:12:26,700 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,700 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,701 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,701 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,702 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,712 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,712 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,714 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,714 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,716 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,716 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,717 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,717 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 19:12:26,726 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 19:12:26,726 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 19:12:26,727 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 19:12:26,731 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 19:12:26,733 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 19:12:26,733 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 19:12:26,761 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 19:12:26,762 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 19:12:26,763 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 19:12:26,764 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 19:12:26,765 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 19:12:26,766 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 19:12:26,766 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 19:12:26,767 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 19:12:26,768 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 19:12:26,768 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 19:12:26,769 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 19:12:26,793 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 19:12:26,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:12:26,972 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:12:26,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:26 WrapperNode [2022-12-13 19:12:26,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:12:26,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:12:26,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:12:26,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:12:26,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:26" (1/1) ... [2022-12-13 19:12:27,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:26" (1/1) ... [2022-12-13 19:12:27,058 INFO L138 Inliner]: procedures = 679, calls = 1039, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2022-12-13 19:12:27,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:12:27,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:12:27,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:12:27,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:12:27,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:26" (1/1) ... [2022-12-13 19:12:27,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:26" (1/1) ... [2022-12-13 19:12:27,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:26" (1/1) ... [2022-12-13 19:12:27,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:26" (1/1) ... [2022-12-13 19:12:27,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:26" (1/1) ... [2022-12-13 19:12:27,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:26" (1/1) ... [2022-12-13 19:12:27,090 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:26" (1/1) ... [2022-12-13 19:12:27,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:26" (1/1) ... [2022-12-13 19:12:27,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:12:27,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:12:27,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:12:27,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:12:27,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:26" (1/1) ... [2022-12-13 19:12:27,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:12:27,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:27,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:12:27,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:12:27,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:12:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 19:12:27,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 19:12:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-13 19:12:27,162 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-13 19:12:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 19:12:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-13 19:12:27,162 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-13 19:12:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:12:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 19:12:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:12:27,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:12:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 19:12:27,162 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 19:12:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:12:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 19:12:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 19:12:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-13 19:12:27,163 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-13 19:12:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:12:27,332 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:12:27,333 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:12:27,497 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:12:27,502 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:12:27,502 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 19:12:27,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:12:27 BoogieIcfgContainer [2022-12-13 19:12:27,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:12:27,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:12:27,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:12:27,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:12:27,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:12:25" (1/3) ... [2022-12-13 19:12:27,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b78fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:12:27, skipping insertion in model container [2022-12-13 19:12:27,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:26" (2/3) ... [2022-12-13 19:12:27,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b78fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:12:27, skipping insertion in model container [2022-12-13 19:12:27,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:12:27" (3/3) ... [2022-12-13 19:12:27,510 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness_negated.i [2022-12-13 19:12:27,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:12:27,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 19:12:27,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:12:27,561 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;@639fa747, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:12:27,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 19:12:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 19:12:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 19:12:27,571 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:27,571 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:12:27,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:27,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:27,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2107862704, now seen corresponding path program 1 times [2022-12-13 19:12:27,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:27,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040524720] [2022-12-13 19:12:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:27,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:27,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:27,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:27,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:27,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 19:12:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:27,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 19:12:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:27,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 19:12:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:27,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 19:12:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:12:27,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:27,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040524720] [2022-12-13 19:12:27,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040524720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:12:27,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:12:27,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:12:27,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519764976] [2022-12-13 19:12:27,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:12:27,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 19:12:27,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:27,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 19:12:27,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 19:12:27,925 INFO L87 Difference]: Start difference. First operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 19:12:27,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:12:27,952 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2022-12-13 19:12:27,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 19:12:27,954 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2022-12-13 19:12:27,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:12:27,960 INFO L225 Difference]: With dead ends: 128 [2022-12-13 19:12:27,960 INFO L226 Difference]: Without dead ends: 63 [2022-12-13 19:12:27,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 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 19:12:27,965 INFO L413 NwaCegarLoop]: 87 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, 87 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 19:12:27,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:12:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-13 19:12:27,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-12-13 19:12:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 19:12:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2022-12-13 19:12:27,998 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2022-12-13 19:12:27,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:12:27,999 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2022-12-13 19:12:27,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 19:12:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2022-12-13 19:12:28,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 19:12:28,002 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:28,002 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:12:28,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:12:28,002 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:28,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:28,003 INFO L85 PathProgramCache]: Analyzing trace with hash 900796622, now seen corresponding path program 1 times [2022-12-13 19:12:28,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:28,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428808662] [2022-12-13 19:12:28,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:28,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:28,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:28,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:28,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:28,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 19:12:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:28,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 19:12:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:28,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 19:12:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:28,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 19:12:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-13 19:12:28,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:28,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428808662] [2022-12-13 19:12:28,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428808662] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:28,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814240929] [2022-12-13 19:12:28,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:28,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:28,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:28,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:12:28,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:12:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:28,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 19:12:28,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:12:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 19:12:28,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:12:28,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814240929] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:12:28,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:12:28,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-13 19:12:28,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874609687] [2022-12-13 19:12:28,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:12:28,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:12:28,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:28,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:12:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:12:28,598 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 19:12:28,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:12:28,645 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2022-12-13 19:12:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:12:28,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2022-12-13 19:12:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:12:28,648 INFO L225 Difference]: With dead ends: 114 [2022-12-13 19:12:28,648 INFO L226 Difference]: Without dead ends: 65 [2022-12-13 19:12:28,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:12:28,649 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:12:28,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 370 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:12:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-13 19:12:28,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-12-13 19:12:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.288888888888889) internal successors, (58), 47 states have internal predecessors, (58), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2022-12-13 19:12:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 86 transitions. [2022-12-13 19:12:28,657 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 86 transitions. Word has length 68 [2022-12-13 19:12:28,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:12:28,657 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 86 transitions. [2022-12-13 19:12:28,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 19:12:28,657 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 86 transitions. [2022-12-13 19:12:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-13 19:12:28,658 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:28,658 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:12:28,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:12:28,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:28,860 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:28,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:28,861 INFO L85 PathProgramCache]: Analyzing trace with hash 577933322, now seen corresponding path program 1 times [2022-12-13 19:12:28,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:28,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444810051] [2022-12-13 19:12:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:28,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:29,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:29,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:29,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:29,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 19:12:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:29,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 19:12:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:29,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 19:12:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:29,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 19:12:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 19:12:29,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:29,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444810051] [2022-12-13 19:12:29,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444810051] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136220563] [2022-12-13 19:12:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:29,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:29,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:29,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:12:29,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:12:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:29,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:12:29,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:12:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 19:12:29,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:12:29,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136220563] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:12:29,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:12:29,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-12-13 19:12:29,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070710211] [2022-12-13 19:12:29,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:12:29,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:12:29,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:29,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:12:29,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-12-13 19:12:29,417 INFO L87 Difference]: Start difference. First operand 65 states and 86 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 19:12:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:12:29,588 INFO L93 Difference]: Finished difference Result 119 states and 161 transitions. [2022-12-13 19:12:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:12:29,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-12-13 19:12:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:12:29,590 INFO L225 Difference]: With dead ends: 119 [2022-12-13 19:12:29,590 INFO L226 Difference]: Without dead ends: 68 [2022-12-13 19:12:29,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:12:29,591 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 103 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:12:29,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 241 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:12:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-13 19:12:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-12-13 19:12:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 50 states have internal predecessors, (60), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-13 19:12:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-12-13 19:12:29,598 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 70 [2022-12-13 19:12:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:12:29,598 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-12-13 19:12:29,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 19:12:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-12-13 19:12:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-13 19:12:29,600 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:29,600 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:12:29,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 19:12:29,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:29,801 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:29,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:29,802 INFO L85 PathProgramCache]: Analyzing trace with hash -34807881, now seen corresponding path program 1 times [2022-12-13 19:12:29,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:29,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642164548] [2022-12-13 19:12:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:29,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 19:12:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 19:12:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:12:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-12-13 19:12:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-13 19:12:30,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:30,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642164548] [2022-12-13 19:12:30,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642164548] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:30,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979551710] [2022-12-13 19:12:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:30,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:30,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:30,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:12:30,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:12:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:12:30,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:12:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 19:12:30,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:12:30,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979551710] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:12:30,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:12:30,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2022-12-13 19:12:30,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057682774] [2022-12-13 19:12:30,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:12:30,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:12:30,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:30,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:12:30,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:12:30,293 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 19:12:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:12:30,488 INFO L93 Difference]: Finished difference Result 134 states and 185 transitions. [2022-12-13 19:12:30,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:12:30,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-12-13 19:12:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:12:30,491 INFO L225 Difference]: With dead ends: 134 [2022-12-13 19:12:30,491 INFO L226 Difference]: Without dead ends: 80 [2022-12-13 19:12:30,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-12-13 19:12:30,492 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 143 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:12:30,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 282 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:12:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-13 19:12:30,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2022-12-13 19:12:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 52 states have internal predecessors, (63), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-13 19:12:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2022-12-13 19:12:30,500 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 72 [2022-12-13 19:12:30,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:12:30,501 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2022-12-13 19:12:30,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 19:12:30,501 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2022-12-13 19:12:30,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-13 19:12:30,502 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:30,502 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:12:30,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 19:12:30,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:30,704 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:30,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:30,704 INFO L85 PathProgramCache]: Analyzing trace with hash 387052583, now seen corresponding path program 1 times [2022-12-13 19:12:30,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:30,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111448850] [2022-12-13 19:12:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:30,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-12-13 19:12:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 19:12:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 19:12:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-12-13 19:12:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-13 19:12:30,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:30,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111448850] [2022-12-13 19:12:30,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111448850] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:30,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676972418] [2022-12-13 19:12:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:30,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:30,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:30,994 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:12:30,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:12:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:31,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 19:12:31,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:12:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 19:12:31,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:12:31,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676972418] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:12:31,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:12:31,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 19:12:31,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609938685] [2022-12-13 19:12:31,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:12:31,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:12:31,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:31,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:12:31,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:12:31,122 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 19:12:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:12:31,137 INFO L93 Difference]: Finished difference Result 135 states and 189 transitions. [2022-12-13 19:12:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:12:31,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-12-13 19:12:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:12:31,139 INFO L225 Difference]: With dead ends: 135 [2022-12-13 19:12:31,139 INFO L226 Difference]: Without dead ends: 79 [2022-12-13 19:12:31,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:12:31,140 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 6 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:12:31,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 160 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:12:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-13 19:12:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2022-12-13 19:12:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.28) internal successors, (64), 53 states have internal predecessors, (64), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-13 19:12:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2022-12-13 19:12:31,148 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 73 [2022-12-13 19:12:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:12:31,148 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2022-12-13 19:12:31,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 19:12:31,149 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2022-12-13 19:12:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-13 19:12:31,150 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:31,150 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:12:31,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:12:31,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:31,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:31,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:31,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1595103561, now seen corresponding path program 1 times [2022-12-13 19:12:31,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:31,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163503637] [2022-12-13 19:12:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:31,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:31,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:31,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:31,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:31,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:31,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 19:12:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:31,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 19:12:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:31,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-12-13 19:12:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:31,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-12-13 19:12:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-13 19:12:31,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:31,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163503637] [2022-12-13 19:12:31,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163503637] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:31,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189098957] [2022-12-13 19:12:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:31,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:31,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:31,701 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:12:31,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:12:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:31,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 19:12:31,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:12:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 19:12:31,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:12:31,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189098957] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:12:31,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:12:31,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2022-12-13 19:12:31,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328759274] [2022-12-13 19:12:31,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:12:31,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:12:31,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:31,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:12:31,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:12:31,855 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-13 19:12:31,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:12:31,914 INFO L93 Difference]: Finished difference Result 134 states and 181 transitions. [2022-12-13 19:12:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:12:31,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2022-12-13 19:12:31,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:12:31,916 INFO L225 Difference]: With dead ends: 134 [2022-12-13 19:12:31,916 INFO L226 Difference]: Without dead ends: 77 [2022-12-13 19:12:31,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:12:31,918 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:12:31,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 457 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:12:31,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-13 19:12:31,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2022-12-13 19:12:31,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 54 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-13 19:12:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2022-12-13 19:12:31,926 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 81 [2022-12-13 19:12:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:12:31,927 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2022-12-13 19:12:31,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-13 19:12:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2022-12-13 19:12:31,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-13 19:12:31,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:31,928 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:12:31,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:12:32,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:32,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:32,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1786751690, now seen corresponding path program 1 times [2022-12-13 19:12:32,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:32,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746948940] [2022-12-13 19:12:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:32,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:32,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:32,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:32,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:32,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:32,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 19:12:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:32,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-12-13 19:12:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:32,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-12-13 19:12:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:32,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-12-13 19:12:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-13 19:12:32,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:32,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746948940] [2022-12-13 19:12:32,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746948940] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:32,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277358484] [2022-12-13 19:12:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:32,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:32,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:32,488 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:12:32,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:12:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:32,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 19:12:32,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:12:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 19:12:32,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:12:32,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277358484] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:12:32,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:12:32,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-13 19:12:32,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281734347] [2022-12-13 19:12:32,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:12:32,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:12:32,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:32,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:12:32,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:12:32,691 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-13 19:12:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:12:32,776 INFO L93 Difference]: Finished difference Result 139 states and 188 transitions. [2022-12-13 19:12:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 19:12:32,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 83 [2022-12-13 19:12:32,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:12:32,778 INFO L225 Difference]: With dead ends: 139 [2022-12-13 19:12:32,778 INFO L226 Difference]: Without dead ends: 81 [2022-12-13 19:12:32,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:12:32,780 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 8 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:12:32,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 538 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:12:32,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-13 19:12:32,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2022-12-13 19:12:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 55 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-13 19:12:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2022-12-13 19:12:32,787 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 83 [2022-12-13 19:12:32,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:12:32,787 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2022-12-13 19:12:32,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-13 19:12:32,787 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2022-12-13 19:12:32,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-13 19:12:32,788 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:32,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:12:32,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 19:12:32,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:32,989 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:32,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1911369352, now seen corresponding path program 1 times [2022-12-13 19:12:32,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:32,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247418422] [2022-12-13 19:12:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:32,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 19:12:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:12:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 19:12:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 19:12:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-13 19:12:33,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:33,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247418422] [2022-12-13 19:12:33,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247418422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:33,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598860777] [2022-12-13 19:12:33,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:33,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:33,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:33,187 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:12:33,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:12:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 19:12:33,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:12:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 19:12:33,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:12:33,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598860777] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:12:33,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:12:33,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-13 19:12:33,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6083420] [2022-12-13 19:12:33,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:12:33,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:12:33,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:33,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:12:33,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:12:33,340 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-13 19:12:33,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:12:33,381 INFO L93 Difference]: Finished difference Result 127 states and 169 transitions. [2022-12-13 19:12:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:12:33,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2022-12-13 19:12:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:12:33,383 INFO L225 Difference]: With dead ends: 127 [2022-12-13 19:12:33,383 INFO L226 Difference]: Without dead ends: 75 [2022-12-13 19:12:33,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:12:33,384 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:12:33,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 371 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:12:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-13 19:12:33,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-12-13 19:12:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 57 states have internal predecessors, (67), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2022-12-13 19:12:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 99 transitions. [2022-12-13 19:12:33,394 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 99 transitions. Word has length 84 [2022-12-13 19:12:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:12:33,394 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 99 transitions. [2022-12-13 19:12:33,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-13 19:12:33,395 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 99 transitions. [2022-12-13 19:12:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-13 19:12:33,396 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:33,396 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:12:33,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 19:12:33,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:33,597 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:33,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1945074884, now seen corresponding path program 1 times [2022-12-13 19:12:33,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:33,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779823404] [2022-12-13 19:12:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:33,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 19:12:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:12:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-12-13 19:12:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-12-13 19:12:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 19:12:33,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:33,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779823404] [2022-12-13 19:12:33,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779823404] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:33,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588521480] [2022-12-13 19:12:33,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:33,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:33,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:33,967 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:12:33,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:12:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:34,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:12:34,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:12:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 19:12:34,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:12:34,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588521480] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:12:34,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:12:34,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2022-12-13 19:12:34,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527830843] [2022-12-13 19:12:34,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:12:34,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:12:34,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:34,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:12:34,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:12:34,188 INFO L87 Difference]: Start difference. First operand 75 states and 99 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-13 19:12:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:12:34,347 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2022-12-13 19:12:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:12:34,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2022-12-13 19:12:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:12:34,349 INFO L225 Difference]: With dead ends: 136 [2022-12-13 19:12:34,349 INFO L226 Difference]: Without dead ends: 75 [2022-12-13 19:12:34,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-12-13 19:12:34,350 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 107 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:12:34,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 280 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:12:34,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-13 19:12:34,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-12-13 19:12:34,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 57 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2022-12-13 19:12:34,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-12-13 19:12:34,357 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 86 [2022-12-13 19:12:34,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:12:34,357 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-12-13 19:12:34,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-13 19:12:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-12-13 19:12:34,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-13 19:12:34,358 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:34,358 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:12:34,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 19:12:34,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:34,559 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:34,560 INFO L85 PathProgramCache]: Analyzing trace with hash -110525007, now seen corresponding path program 1 times [2022-12-13 19:12:34,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:34,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342039564] [2022-12-13 19:12:34,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:34,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:34,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:34,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:34,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:34,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:34,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 19:12:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:34,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:12:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:34,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-12-13 19:12:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:34,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-12-13 19:12:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 19:12:34,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:34,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342039564] [2022-12-13 19:12:34,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342039564] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:34,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692306781] [2022-12-13 19:12:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:34,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:34,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:34,979 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:12:34,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:12:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:35,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:12:35,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:12:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 19:12:35,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:12:35,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692306781] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:12:35,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:12:35,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2022-12-13 19:12:35,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376589369] [2022-12-13 19:12:35,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:12:35,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:12:35,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:35,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:12:35,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:12:35,228 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-13 19:12:35,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:12:35,420 INFO L93 Difference]: Finished difference Result 138 states and 181 transitions. [2022-12-13 19:12:35,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:12:35,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2022-12-13 19:12:35,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:12:35,422 INFO L225 Difference]: With dead ends: 138 [2022-12-13 19:12:35,422 INFO L226 Difference]: Without dead ends: 76 [2022-12-13 19:12:35,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-12-13 19:12:35,423 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 137 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:12:35,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 312 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:12:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-13 19:12:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2022-12-13 19:12:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.24) internal successors, (62), 53 states have internal predecessors, (62), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-13 19:12:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2022-12-13 19:12:35,430 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 88 [2022-12-13 19:12:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:12:35,431 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2022-12-13 19:12:35,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-13 19:12:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2022-12-13 19:12:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-13 19:12:35,432 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:35,432 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:12:35,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 19:12:35,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 19:12:35,633 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:35,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:35,634 INFO L85 PathProgramCache]: Analyzing trace with hash -803958397, now seen corresponding path program 1 times [2022-12-13 19:12:35,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:35,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399647142] [2022-12-13 19:12:35,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:35,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:35,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:35,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:35,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:35,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:35,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 19:12:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:35,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:12:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:35,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:35,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-12-13 19:12:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:35,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 19:12:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 19:12:35,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:35,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399647142] [2022-12-13 19:12:35,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399647142] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:35,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87878099] [2022-12-13 19:12:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:35,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:35,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:35,940 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:12:35,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 19:12:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:36,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 19:12:36,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:12:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 19:12:36,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:12:36,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87878099] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:12:36,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:12:36,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2022-12-13 19:12:36,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198670897] [2022-12-13 19:12:36,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:12:36,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:12:36,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:36,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:12:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:12:36,117 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-13 19:12:36,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:12:36,157 INFO L93 Difference]: Finished difference Result 124 states and 163 transitions. [2022-12-13 19:12:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:12:36,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 97 [2022-12-13 19:12:36,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:12:36,159 INFO L225 Difference]: With dead ends: 124 [2022-12-13 19:12:36,159 INFO L226 Difference]: Without dead ends: 74 [2022-12-13 19:12:36,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:12:36,160 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 4 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:12:36,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 448 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:12:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-13 19:12:36,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-12-13 19:12:36,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 54 states have internal predecessors, (63), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-12-13 19:12:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2022-12-13 19:12:36,167 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 97 [2022-12-13 19:12:36,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:12:36,167 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2022-12-13 19:12:36,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-13 19:12:36,167 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2022-12-13 19:12:36,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-13 19:12:36,168 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:36,168 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:36,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 19:12:36,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 19:12:36,369 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:36,369 INFO L85 PathProgramCache]: Analyzing trace with hash -526621008, now seen corresponding path program 2 times [2022-12-13 19:12:36,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:36,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435283743] [2022-12-13 19:12:36,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:36,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:36,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:36,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:36,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:36,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:36,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 19:12:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:36,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:12:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:36,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:36,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-12-13 19:12:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:36,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 19:12:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 19:12:36,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:36,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435283743] [2022-12-13 19:12:36,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435283743] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:36,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005169661] [2022-12-13 19:12:36,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:12:36,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:36,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:36,880 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:12:36,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 19:12:37,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:12:37,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:12:37,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:12:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:12:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-12-13 19:12:37,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:12:37,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005169661] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:12:37,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:12:37,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2022-12-13 19:12:37,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79327711] [2022-12-13 19:12:37,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:12:37,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:12:37,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:12:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:12:37,057 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-13 19:12:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:12:37,087 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2022-12-13 19:12:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:12:37,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 99 [2022-12-13 19:12:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:12:37,088 INFO L225 Difference]: With dead ends: 82 [2022-12-13 19:12:37,088 INFO L226 Difference]: Without dead ends: 80 [2022-12-13 19:12:37,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:12:37,089 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 5 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:12:37,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 382 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:12:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-13 19:12:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-12-13 19:12:37,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 59 states have internal predecessors, (67), 14 states have call successors, (14), 6 states have call predecessors, (14), 9 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-12-13 19:12:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2022-12-13 19:12:37,095 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 99 [2022-12-13 19:12:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:12:37,095 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2022-12-13 19:12:37,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-13 19:12:37,095 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2022-12-13 19:12:37,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-13 19:12:37,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:37,096 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:37,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 19:12:37,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:37,298 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:37,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:37,299 INFO L85 PathProgramCache]: Analyzing trace with hash -772185839, now seen corresponding path program 1 times [2022-12-13 19:12:37,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:37,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124677518] [2022-12-13 19:12:37,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:37,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:37,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:37,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:37,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:37,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:37,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 19:12:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:37,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:12:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:37,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:37,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-12-13 19:12:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:37,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 19:12:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:37,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-12-13 19:12:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 19:12:37,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:37,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124677518] [2022-12-13 19:12:37,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124677518] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:37,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918129228] [2022-12-13 19:12:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:37,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:37,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:37,810 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:12:37,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 19:12:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:37,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 19:12:37,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:12:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 19:12:38,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:12:38,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918129228] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:12:38,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:12:38,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2022-12-13 19:12:38,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857526382] [2022-12-13 19:12:38,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:12:38,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:12:38,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:38,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:12:38,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:12:38,071 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-13 19:12:38,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:12:38,147 INFO L93 Difference]: Finished difference Result 137 states and 176 transitions. [2022-12-13 19:12:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:12:38,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 105 [2022-12-13 19:12:38,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:12:38,148 INFO L225 Difference]: With dead ends: 137 [2022-12-13 19:12:38,148 INFO L226 Difference]: Without dead ends: 79 [2022-12-13 19:12:38,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2022-12-13 19:12:38,149 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 8 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:12:38,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 511 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:12:38,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-13 19:12:38,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-12-13 19:12:38,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 56 states have internal predecessors, (65), 14 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-12-13 19:12:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2022-12-13 19:12:38,153 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 105 [2022-12-13 19:12:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:12:38,153 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2022-12-13 19:12:38,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-13 19:12:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2022-12-13 19:12:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-13 19:12:38,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:38,155 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:38,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 19:12:38,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:38,356 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:38,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash 166988707, now seen corresponding path program 1 times [2022-12-13 19:12:38,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:38,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207030990] [2022-12-13 19:12:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:38,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:38,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:38,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:38,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:39,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:39,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 19:12:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:39,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:12:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:39,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:39,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-12-13 19:12:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:39,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-12-13 19:12:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:39,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-12-13 19:12:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 19:12:39,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:39,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207030990] [2022-12-13 19:12:39,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207030990] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:39,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142456019] [2022-12-13 19:12:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:39,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:39,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:39,146 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:12:39,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 19:12:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:39,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 19:12:39,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:12:39,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 19:12:39,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 19:12:39,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:12:39,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:12:39,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-12-13 19:12:39,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:12:39,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:12:39,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-12-13 19:12:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 19:12:40,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:12:40,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 366 treesize of output 360 [2022-12-13 19:12:41,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:12:41,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 19:12:41,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:12:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-13 19:12:41,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142456019] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:41,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:12:41,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 12] total 24 [2022-12-13 19:12:41,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403805499] [2022-12-13 19:12:41,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:12:41,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:12:41,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:41,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:12:41,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=475, Unknown=1, NotChecked=0, Total=552 [2022-12-13 19:12:41,078 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-13 19:12:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:12:41,650 INFO L93 Difference]: Finished difference Result 149 states and 199 transitions. [2022-12-13 19:12:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:12:41,650 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 106 [2022-12-13 19:12:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:12:41,651 INFO L225 Difference]: With dead ends: 149 [2022-12-13 19:12:41,651 INFO L226 Difference]: Without dead ends: 98 [2022-12-13 19:12:41,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 209 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=606, Unknown=1, NotChecked=0, Total=702 [2022-12-13 19:12:41,652 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 53 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 19:12:41,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 380 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 19:12:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-13 19:12:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-12-13 19:12:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 68 states have internal predecessors, (77), 24 states have call successors, (24), 6 states have call predecessors, (24), 9 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2022-12-13 19:12:41,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 134 transitions. [2022-12-13 19:12:41,664 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 134 transitions. Word has length 106 [2022-12-13 19:12:41,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:12:41,665 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 134 transitions. [2022-12-13 19:12:41,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-13 19:12:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 134 transitions. [2022-12-13 19:12:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-13 19:12:41,666 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:12:41,666 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:41,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 19:12:41,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 19:12:41,867 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:12:41,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:12:41,868 INFO L85 PathProgramCache]: Analyzing trace with hash -844128543, now seen corresponding path program 1 times [2022-12-13 19:12:41,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:12:41,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112113157] [2022-12-13 19:12:41,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:41,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:12:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:42,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:12:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:42,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:12:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:42,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:12:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:42,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:42,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 19:12:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:42,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:12:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:42,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:12:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:42,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-12-13 19:12:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:42,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-12-13 19:12:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:42,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-12-13 19:12:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 19:12:42,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:12:42,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112113157] [2022-12-13 19:12:42,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112113157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:12:42,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398245674] [2022-12-13 19:12:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:12:42,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:12:42,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:12:42,515 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:12:42,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 19:12:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:12:42,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 19:12:42,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:12:42,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-13 19:12:42,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 19:12:42,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 19:12:43,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-12-13 19:12:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 29 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:12:44,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:12:45,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2022-12-13 19:12:45,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-13 19:12:45,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-13 19:12:45,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-13 19:12:45,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:12:45,064 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 237 treesize of output 233 [2022-12-13 19:12:45,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:12:45,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 269 treesize of output 257 [2022-12-13 19:12:45,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:12:45,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 257 treesize of output 251 [2022-12-13 19:12:45,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:12:45,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 100 [2022-12-13 19:12:45,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:12:45,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-12-13 19:12:45,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:12:45,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 94 [2022-12-13 19:12:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 19:12:45,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398245674] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:12:45,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:12:45,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 17] total 41 [2022-12-13 19:12:45,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955556029] [2022-12-13 19:12:45,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:12:45,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 19:12:45,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:12:45,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 19:12:45,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 19:12:45,327 INFO L87 Difference]: Start difference. First operand 97 states and 134 transitions. Second operand has 41 states, 41 states have (on average 4.097560975609756) internal successors, (168), 39 states have internal predecessors, (168), 16 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (24), 13 states have call predecessors, (24), 16 states have call successors, (24) [2022-12-13 19:12:47,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:12:49,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:12:51,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:12:53,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:12:55,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:12:57,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:12:59,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:01,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:03,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:08,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:13:08,323 INFO L93 Difference]: Finished difference Result 440 states and 611 transitions. [2022-12-13 19:13:08,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-13 19:13:08,324 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.097560975609756) internal successors, (168), 39 states have internal predecessors, (168), 16 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (24), 13 states have call predecessors, (24), 16 states have call successors, (24) Word has length 106 [2022-12-13 19:13:08,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:13:08,325 INFO L225 Difference]: With dead ends: 440 [2022-12-13 19:13:08,325 INFO L226 Difference]: Without dead ends: 287 [2022-12-13 19:13:08,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 226 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2915 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1676, Invalid=8224, Unknown=0, NotChecked=0, Total=9900 [2022-12-13 19:13:08,329 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 983 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 2091 mSolverCounterSat, 465 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 2565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 2091 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2022-12-13 19:13:08,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 1369 Invalid, 2565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 2091 Invalid, 9 Unknown, 0 Unchecked, 20.5s Time] [2022-12-13 19:13:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-12-13 19:13:08,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 240. [2022-12-13 19:13:08,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 176 states have (on average 1.2727272727272727) internal successors, (224), 185 states have internal predecessors, (224), 38 states have call successors, (38), 18 states have call predecessors, (38), 25 states have return successors, (51), 36 states have call predecessors, (51), 35 states have call successors, (51) [2022-12-13 19:13:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 313 transitions. [2022-12-13 19:13:08,359 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 313 transitions. Word has length 106 [2022-12-13 19:13:08,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:13:08,359 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 313 transitions. [2022-12-13 19:13:08,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.097560975609756) internal successors, (168), 39 states have internal predecessors, (168), 16 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (24), 13 states have call predecessors, (24), 16 states have call successors, (24) [2022-12-13 19:13:08,359 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 313 transitions. [2022-12-13 19:13:08,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-13 19:13:08,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:13:08,366 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:13:08,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 19:13:08,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 19:13:08,567 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:13:08,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1786492769, now seen corresponding path program 1 times [2022-12-13 19:13:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:13:08,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146140046] [2022-12-13 19:13:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:08,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:13:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:09,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:13:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:09,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:13:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:09,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 19:13:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:09,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:13:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:09,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 19:13:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:09,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 19:13:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:09,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:13:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:09,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-12-13 19:13:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:09,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-12-13 19:13:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:09,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-12-13 19:13:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 19:13:09,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:13:09,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146140046] [2022-12-13 19:13:09,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146140046] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:13:09,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352189936] [2022-12-13 19:13:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:09,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:13:09,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:13:09,359 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:13:09,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 19:13:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:09,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 19:13:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:09,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-13 19:13:09,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:13:09,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 19:13:09,671 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-12-13 19:13:09,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 94 [2022-12-13 19:13:09,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:13:09,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 68 [2022-12-13 19:13:09,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-13 19:13:09,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:13:09,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 23 [2022-12-13 19:13:09,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 19:13:11,715 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_33| Int)) (<= (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_33|) 0) 2) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_33|)) is different from true [2022-12-13 19:13:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 50 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 19:13:26,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:13:30,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:13:30,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2022-12-13 19:13:30,459 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:13:30,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 149 [2022-12-13 19:13:30,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 140 [2022-12-13 19:13:30,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 138 [2022-12-13 19:13:30,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-13 19:13:30,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-12-13 19:13:30,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:13:30,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 56 [2022-12-13 19:13:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 19:13:30,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352189936] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:13:30,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:13:30,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 31 [2022-12-13 19:13:30,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043781634] [2022-12-13 19:13:30,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:13:30,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 19:13:30,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:13:30,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 19:13:30,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=781, Unknown=9, NotChecked=56, Total=930 [2022-12-13 19:13:30,690 INFO L87 Difference]: Start difference. First operand 240 states and 313 transitions. Second operand has 31 states, 31 states have (on average 4.903225806451613) internal successors, (152), 31 states have internal predecessors, (152), 11 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 8 states have call predecessors, (24), 11 states have call successors, (24) [2022-12-13 19:13:35,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:37,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:39,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:41,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:43,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:45,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:47,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:49,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:51,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:53,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:55,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:57,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:59,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:01,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:05,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:07,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:11,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:13,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:17,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:23,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:25,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:27,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:29,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:33,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:35,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:37,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:39,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:41,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:43,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:45,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:51,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:57,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:14:59,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:01,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:03,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:05,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:07,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:14,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:16,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:18,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:20,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:22,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:24,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:24,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:15:24,946 INFO L93 Difference]: Finished difference Result 432 states and 584 transitions. [2022-12-13 19:15:24,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 19:15:24,947 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.903225806451613) internal successors, (152), 31 states have internal predecessors, (152), 11 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 8 states have call predecessors, (24), 11 states have call successors, (24) Word has length 108 [2022-12-13 19:15:24,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:15:24,949 INFO L225 Difference]: With dead ends: 432 [2022-12-13 19:15:24,949 INFO L226 Difference]: Without dead ends: 338 [2022-12-13 19:15:24,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=216, Invalid=1496, Unknown=14, NotChecked=80, Total=1806 [2022-12-13 19:15:24,952 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 341 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 203 mSolverCounterUnsat, 43 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 2258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 43 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 87.6s IncrementalHoareTripleChecker+Time [2022-12-13 19:15:24,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 1676 Invalid, 2258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1751 Invalid, 43 Unknown, 261 Unchecked, 87.6s Time] [2022-12-13 19:15:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-12-13 19:15:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 281. [2022-12-13 19:15:24,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 211 states have (on average 1.2748815165876777) internal successors, (269), 221 states have internal predecessors, (269), 41 states have call successors, (41), 20 states have call predecessors, (41), 28 states have return successors, (56), 39 states have call predecessors, (56), 38 states have call successors, (56) [2022-12-13 19:15:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 366 transitions. [2022-12-13 19:15:24,979 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 366 transitions. Word has length 108 [2022-12-13 19:15:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:15:24,980 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 366 transitions. [2022-12-13 19:15:24,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.903225806451613) internal successors, (152), 31 states have internal predecessors, (152), 11 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 8 states have call predecessors, (24), 11 states have call successors, (24) [2022-12-13 19:15:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 366 transitions. [2022-12-13 19:15:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-13 19:15:24,980 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:15:24,981 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:15:24,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 19:15:25,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 19:15:25,182 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:15:25,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:25,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1865196897, now seen corresponding path program 1 times [2022-12-13 19:15:25,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:15:25,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146735646] [2022-12-13 19:15:25,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:25,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:15:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:25,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:15:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:25,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:15:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:25,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:15:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:25,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:15:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:25,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 19:15:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:25,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:15:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:25,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:15:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:25,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-12-13 19:15:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:25,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-12-13 19:15:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:25,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-12-13 19:15:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 35 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 19:15:25,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:15:25,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146735646] [2022-12-13 19:15:25,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146735646] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:15:25,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71769894] [2022-12-13 19:15:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:25,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:15:25,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:15:25,948 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:15:25,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 19:15:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:26,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 19:15:26,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:26,147 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 19:15:26,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 19:15:26,159 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 19:15:26,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 19:15:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 19:15:27,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:15:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 19:15:27,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71769894] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:15:27,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:15:27,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 12] total 30 [2022-12-13 19:15:27,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193499140] [2022-12-13 19:15:27,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:15:27,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 19:15:27,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:15:27,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 19:15:27,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-12-13 19:15:27,629 INFO L87 Difference]: Start difference. First operand 281 states and 366 transitions. Second operand has 30 states, 30 states have (on average 4.9) internal successors, (147), 28 states have internal predecessors, (147), 12 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (26), 11 states have call predecessors, (26), 12 states have call successors, (26) [2022-12-13 19:15:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:15:29,659 INFO L93 Difference]: Finished difference Result 1296 states and 1765 transitions. [2022-12-13 19:15:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 19:15:29,660 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.9) internal successors, (147), 28 states have internal predecessors, (147), 12 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (26), 11 states have call predecessors, (26), 12 states have call successors, (26) Word has length 106 [2022-12-13 19:15:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:15:29,664 INFO L225 Difference]: With dead ends: 1296 [2022-12-13 19:15:29,664 INFO L226 Difference]: Without dead ends: 1067 [2022-12-13 19:15:29,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 223 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=537, Invalid=2655, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 19:15:29,666 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 407 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 19:15:29,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 1161 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 19:15:29,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2022-12-13 19:15:29,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 812. [2022-12-13 19:15:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 616 states have (on average 1.2905844155844155) internal successors, (795), 645 states have internal predecessors, (795), 112 states have call successors, (112), 56 states have call predecessors, (112), 83 states have return successors, (180), 110 states have call predecessors, (180), 103 states have call successors, (180) [2022-12-13 19:15:29,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1087 transitions. [2022-12-13 19:15:29,759 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1087 transitions. Word has length 106 [2022-12-13 19:15:29,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:15:29,759 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1087 transitions. [2022-12-13 19:15:29,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.9) internal successors, (147), 28 states have internal predecessors, (147), 12 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (26), 11 states have call predecessors, (26), 12 states have call successors, (26) [2022-12-13 19:15:29,759 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1087 transitions. [2022-12-13 19:15:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-13 19:15:29,761 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:15:29,761 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:15:29,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 19:15:29,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 19:15:29,962 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:15:29,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:29,962 INFO L85 PathProgramCache]: Analyzing trace with hash 435625693, now seen corresponding path program 1 times [2022-12-13 19:15:29,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:15:29,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67334595] [2022-12-13 19:15:29,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:29,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:15:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:30,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:15:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:30,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:15:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:30,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:15:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:30,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:15:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:30,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 19:15:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:30,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:15:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:30,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:15:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:30,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-12-13 19:15:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:30,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-12-13 19:15:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:30,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-12-13 19:15:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 19:15:30,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:15:30,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67334595] [2022-12-13 19:15:30,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67334595] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:15:30,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388876518] [2022-12-13 19:15:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:30,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:15:30,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:15:30,516 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:15:30,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 19:15:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:30,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-13 19:15:30,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:30,763 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 19:15:30,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 19:15:31,709 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:15:31,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:15:32,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 100 [2022-12-13 19:15:32,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2022-12-13 19:15:32,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 88 [2022-12-13 19:15:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 19:15:32,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388876518] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:15:32,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:15:32,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 16] total 36 [2022-12-13 19:15:32,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846915775] [2022-12-13 19:15:32,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:15:32,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 19:15:32,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:15:32,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 19:15:32,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 19:15:32,274 INFO L87 Difference]: Start difference. First operand 812 states and 1087 transitions. Second operand has 36 states, 36 states have (on average 4.277777777777778) internal successors, (154), 34 states have internal predecessors, (154), 15 states have call successors, (25), 3 states have call predecessors, (25), 8 states have return successors, (24), 13 states have call predecessors, (24), 15 states have call successors, (24) [2022-12-13 19:15:34,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:36,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:38,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:40,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:15:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:15:43,556 INFO L93 Difference]: Finished difference Result 1896 states and 2653 transitions. [2022-12-13 19:15:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 19:15:43,556 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.277777777777778) internal successors, (154), 34 states have internal predecessors, (154), 15 states have call successors, (25), 3 states have call predecessors, (25), 8 states have return successors, (24), 13 states have call predecessors, (24), 15 states have call successors, (24) Word has length 106 [2022-12-13 19:15:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:15:43,561 INFO L225 Difference]: With dead ends: 1896 [2022-12-13 19:15:43,561 INFO L226 Difference]: Without dead ends: 1541 [2022-12-13 19:15:43,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 225 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=786, Invalid=3636, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 19:15:43,564 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 712 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 2089 mSolverCounterSat, 281 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 2374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 2089 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-12-13 19:15:43,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 1608 Invalid, 2374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 2089 Invalid, 4 Unknown, 0 Unchecked, 9.9s Time] [2022-12-13 19:15:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2022-12-13 19:15:43,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 910. [2022-12-13 19:15:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 707 states have (on average 1.3026874115983027) internal successors, (921), 739 states have internal predecessors, (921), 116 states have call successors, (116), 56 states have call predecessors, (116), 86 states have return successors, (191), 114 states have call predecessors, (191), 107 states have call successors, (191) [2022-12-13 19:15:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1228 transitions. [2022-12-13 19:15:43,677 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1228 transitions. Word has length 106 [2022-12-13 19:15:43,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:15:43,677 INFO L495 AbstractCegarLoop]: Abstraction has 910 states and 1228 transitions. [2022-12-13 19:15:43,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.277777777777778) internal successors, (154), 34 states have internal predecessors, (154), 15 states have call successors, (25), 3 states have call predecessors, (25), 8 states have return successors, (24), 13 states have call predecessors, (24), 15 states have call successors, (24) [2022-12-13 19:15:43,677 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1228 transitions. [2022-12-13 19:15:43,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-13 19:15:43,679 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:15:43,679 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:15:43,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 19:15:43,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 19:15:43,880 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:15:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:43,881 INFO L85 PathProgramCache]: Analyzing trace with hash -382022757, now seen corresponding path program 1 times [2022-12-13 19:15:43,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:15:43,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476554459] [2022-12-13 19:15:43,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:43,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:15:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:44,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:15:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:44,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:15:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:44,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:15:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:44,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:15:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:44,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 19:15:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:44,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:15:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:44,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:15:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:44,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-12-13 19:15:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:44,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-12-13 19:15:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:44,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-12-13 19:15:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 19:15:44,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:15:44,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476554459] [2022-12-13 19:15:44,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476554459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:15:44,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554663397] [2022-12-13 19:15:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:44,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:15:44,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:15:44,173 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:15:44,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 19:15:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:44,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:15:44,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 19:15:44,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:15:44,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554663397] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:15:44,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:15:44,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-13 19:15:44,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917825053] [2022-12-13 19:15:44,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:15:44,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:15:44,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:15:44,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:15:44,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:15:44,398 INFO L87 Difference]: Start difference. First operand 910 states and 1228 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-12-13 19:15:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:15:44,635 INFO L93 Difference]: Finished difference Result 2134 states and 2937 transitions. [2022-12-13 19:15:44,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:15:44,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 106 [2022-12-13 19:15:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:15:44,638 INFO L225 Difference]: With dead ends: 2134 [2022-12-13 19:15:44,638 INFO L226 Difference]: Without dead ends: 851 [2022-12-13 19:15:44,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:15:44,641 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 92 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:15:44,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 347 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:15:44,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-12-13 19:15:44,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 851. [2022-12-13 19:15:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 654 states have (on average 1.2629969418960245) internal successors, (826), 684 states have internal predecessors, (826), 114 states have call successors, (114), 54 states have call predecessors, (114), 82 states have return successors, (186), 112 states have call predecessors, (186), 105 states have call successors, (186) [2022-12-13 19:15:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1126 transitions. [2022-12-13 19:15:44,734 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1126 transitions. Word has length 106 [2022-12-13 19:15:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:15:44,735 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1126 transitions. [2022-12-13 19:15:44,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-12-13 19:15:44,735 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1126 transitions. [2022-12-13 19:15:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-13 19:15:44,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:15:44,736 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:15:44,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 19:15:44,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:15:44,938 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:15:44,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:44,939 INFO L85 PathProgramCache]: Analyzing trace with hash 69559195, now seen corresponding path program 1 times [2022-12-13 19:15:44,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:15:44,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632013640] [2022-12-13 19:15:44,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:44,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:15:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:15:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:15:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:15:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:15:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 19:15:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:15:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:15:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-12-13 19:15:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-12-13 19:15:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-12-13 19:15:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 19:15:45,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:15:45,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632013640] [2022-12-13 19:15:45,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632013640] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:15:45,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814594154] [2022-12-13 19:15:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:45,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:15:45,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:15:45,128 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:15:45,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 19:15:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:15:45,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-13 19:15:45,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:15:45,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814594154] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:15:45,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:15:45,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-12-13 19:15:45,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585405839] [2022-12-13 19:15:45,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:15:45,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:15:45,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:15:45,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:15:45,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:15:45,264 INFO L87 Difference]: Start difference. First operand 851 states and 1126 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 19:15:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:15:45,313 INFO L93 Difference]: Finished difference Result 1114 states and 1470 transitions. [2022-12-13 19:15:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:15:45,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 106 [2022-12-13 19:15:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:15:45,314 INFO L225 Difference]: With dead ends: 1114 [2022-12-13 19:15:45,314 INFO L226 Difference]: Without dead ends: 349 [2022-12-13 19:15:45,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:15:45,316 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 3 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:15:45,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 226 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:15:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-12-13 19:15:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2022-12-13 19:15:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 272 states have (on average 1.1838235294117647) internal successors, (322), 283 states have internal predecessors, (322), 44 states have call successors, (44), 23 states have call predecessors, (44), 32 states have return successors, (59), 42 states have call predecessors, (59), 41 states have call successors, (59) [2022-12-13 19:15:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 425 transitions. [2022-12-13 19:15:45,353 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 425 transitions. Word has length 106 [2022-12-13 19:15:45,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:15:45,353 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 425 transitions. [2022-12-13 19:15:45,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 19:15:45,353 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 425 transitions. [2022-12-13 19:15:45,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-13 19:15:45,354 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:15:45,354 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-13 19:15:45,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 19:15:45,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-13 19:15:45,555 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:15:45,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:45,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2065682137, now seen corresponding path program 1 times [2022-12-13 19:15:45,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:15:45,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267346678] [2022-12-13 19:15:45,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:45,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:15:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:15:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:15:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:15:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:15:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 19:15:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:15:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:15:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-12-13 19:15:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-12-13 19:15:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:15:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-12-13 19:15:45,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:15:45,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267346678] [2022-12-13 19:15:45,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267346678] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:15:45,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:15:45,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 19:15:45,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405276494] [2022-12-13 19:15:45,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:15:45,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:15:45,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:15:45,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:15:45,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:15:45,790 INFO L87 Difference]: Start difference. First operand 349 states and 425 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-13 19:15:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:15:45,871 INFO L93 Difference]: Finished difference Result 378 states and 459 transitions. [2022-12-13 19:15:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:15:45,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 113 [2022-12-13 19:15:45,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:15:45,872 INFO L225 Difference]: With dead ends: 378 [2022-12-13 19:15:45,872 INFO L226 Difference]: Without dead ends: 376 [2022-12-13 19:15:45,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 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 19:15:45,873 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 7 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:15:45,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 464 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:15:45,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-12-13 19:15:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 363. [2022-12-13 19:15:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 281 states have (on average 1.1779359430604983) internal successors, (331), 295 states have internal predecessors, (331), 45 states have call successors, (45), 24 states have call predecessors, (45), 36 states have return successors, (66), 43 states have call predecessors, (66), 42 states have call successors, (66) [2022-12-13 19:15:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 442 transitions. [2022-12-13 19:15:45,912 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 442 transitions. Word has length 113 [2022-12-13 19:15:45,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:15:45,913 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 442 transitions. [2022-12-13 19:15:45,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-13 19:15:45,913 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 442 transitions. [2022-12-13 19:15:45,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-13 19:15:45,913 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:15:45,913 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:15:45,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 19:15:45,914 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:15:45,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:45,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1299797420, now seen corresponding path program 1 times [2022-12-13 19:15:45,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:15:45,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281879359] [2022-12-13 19:15:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:45,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:15:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:46,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:15:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:46,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:15:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:46,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:15:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:46,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:15:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:46,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 19:15:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:46,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 19:15:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:46,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:15:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:46,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-12-13 19:15:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:46,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-12-13 19:15:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:46,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:15:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-13 19:15:46,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:15:46,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281879359] [2022-12-13 19:15:46,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281879359] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:15:46,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743] [2022-12-13 19:15:46,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:46,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:15:46,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:15:46,420 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:15:46,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 19:15:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:46,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 79 conjunts are in the unsatisfiable core [2022-12-13 19:15:46,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:46,652 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 19:15:46,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 19:15:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 54 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 19:15:47,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:15:47,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 113 [2022-12-13 19:15:47,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 105 [2022-12-13 19:15:47,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 101 [2022-12-13 19:15:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 47 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-13 19:15:47,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:15:47,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:15:47,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 16] total 40 [2022-12-13 19:15:47,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438328100] [2022-12-13 19:15:47,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:15:47,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 19:15:47,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:15:47,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 19:15:47,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 19:15:47,825 INFO L87 Difference]: Start difference. First operand 363 states and 442 transitions. Second operand has 40 states, 40 states have (on average 4.2) internal successors, (168), 37 states have internal predecessors, (168), 19 states have call successors, (29), 3 states have call predecessors, (29), 8 states have return successors, (29), 18 states have call predecessors, (29), 18 states have call successors, (29) [2022-12-13 19:15:49,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:15:49,237 INFO L93 Difference]: Finished difference Result 462 states and 570 transitions. [2022-12-13 19:15:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 19:15:49,237 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.2) internal successors, (168), 37 states have internal predecessors, (168), 19 states have call successors, (29), 3 states have call predecessors, (29), 8 states have return successors, (29), 18 states have call predecessors, (29), 18 states have call successors, (29) Word has length 115 [2022-12-13 19:15:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:15:49,240 INFO L225 Difference]: With dead ends: 462 [2022-12-13 19:15:49,240 INFO L226 Difference]: Without dead ends: 410 [2022-12-13 19:15:49,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 227 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=414, Invalid=2556, Unknown=0, NotChecked=0, Total=2970 [2022-12-13 19:15:49,241 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 452 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 19:15:49,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 1498 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 19:15:49,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-12-13 19:15:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 366. [2022-12-13 19:15:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 283 states have (on average 1.1802120141342756) internal successors, (334), 297 states have internal predecessors, (334), 46 states have call successors, (46), 24 states have call predecessors, (46), 36 states have return successors, (67), 44 states have call predecessors, (67), 43 states have call successors, (67) [2022-12-13 19:15:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 447 transitions. [2022-12-13 19:15:49,284 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 447 transitions. Word has length 115 [2022-12-13 19:15:49,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:15:49,284 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 447 transitions. [2022-12-13 19:15:49,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.2) internal successors, (168), 37 states have internal predecessors, (168), 19 states have call successors, (29), 3 states have call predecessors, (29), 8 states have return successors, (29), 18 states have call predecessors, (29), 18 states have call successors, (29) [2022-12-13 19:15:49,284 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 447 transitions. [2022-12-13 19:15:49,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-13 19:15:49,286 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:15:49,286 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:15:49,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 19:15:49,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:15:49,487 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:15:49,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:49,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1112769404, now seen corresponding path program 1 times [2022-12-13 19:15:49,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:15:49,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494814140] [2022-12-13 19:15:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:49,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:15:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:15:49,556 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 19:15:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:15:49,625 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 19:15:49,625 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 19:15:49,626 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-13 19:15:49,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 19:15:49,630 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:15:49,634 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 19:15:49,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 07:15:49 BoogieIcfgContainer [2022-12-13 19:15:49,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 19:15:49,706 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 19:15:49,706 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 19:15:49,706 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 19:15:49,707 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:12:27" (3/4) ... [2022-12-13 19:15:49,708 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-13 19:15:49,768 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 19:15:49,768 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 19:15:49,769 INFO L158 Benchmark]: Toolchain (without parser) took 204422.74ms. Allocated memory was 142.6MB in the beginning and 314.6MB in the end (delta: 172.0MB). Free memory was 100.8MB in the beginning and 251.4MB in the end (delta: -150.6MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. [2022-12-13 19:15:49,769 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 142.6MB. Free memory is still 111.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:15:49,769 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1625.33ms. Allocated memory was 142.6MB in the beginning and 180.4MB in the end (delta: 37.7MB). Free memory was 100.8MB in the beginning and 125.4MB in the end (delta: -24.6MB). Peak memory consumption was 75.2MB. Max. memory is 16.1GB. [2022-12-13 19:15:49,769 INFO L158 Benchmark]: Boogie Procedure Inliner took 85.62ms. Allocated memory is still 180.4MB. Free memory was 125.4MB in the beginning and 120.0MB in the end (delta: 5.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-13 19:15:49,770 INFO L158 Benchmark]: Boogie Preprocessor took 36.83ms. Allocated memory is still 180.4MB. Free memory was 120.0MB in the beginning and 117.0MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 19:15:49,770 INFO L158 Benchmark]: RCFGBuilder took 407.35ms. Allocated memory is still 180.4MB. Free memory was 117.0MB in the beginning and 92.9MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-12-13 19:15:49,770 INFO L158 Benchmark]: TraceAbstraction took 202200.49ms. Allocated memory was 180.4MB in the beginning and 314.6MB in the end (delta: 134.2MB). Free memory was 92.9MB in the beginning and 258.8MB in the end (delta: -165.9MB). Peak memory consumption was 147.7MB. Max. memory is 16.1GB. [2022-12-13 19:15:49,770 INFO L158 Benchmark]: Witness Printer took 61.91ms. Allocated memory is still 314.6MB. Free memory was 258.8MB in the beginning and 251.4MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 19:15:49,772 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 142.6MB. Free memory is still 111.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1625.33ms. Allocated memory was 142.6MB in the beginning and 180.4MB in the end (delta: 37.7MB). Free memory was 100.8MB in the beginning and 125.4MB in the end (delta: -24.6MB). Peak memory consumption was 75.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 85.62ms. Allocated memory is still 180.4MB. Free memory was 125.4MB in the beginning and 120.0MB in the end (delta: 5.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.83ms. Allocated memory is still 180.4MB. Free memory was 120.0MB in the beginning and 117.0MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 407.35ms. Allocated memory is still 180.4MB. Free memory was 117.0MB in the beginning and 92.9MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 202200.49ms. Allocated memory was 180.4MB in the beginning and 314.6MB in the end (delta: 134.2MB). Free memory was 92.9MB in the beginning and 258.8MB in the end (delta: -165.9MB). Peak memory consumption was 147.7MB. Max. memory is 16.1GB. * Witness Printer took 61.91ms. Allocated memory is still 314.6MB. Free memory was 258.8MB in the beginning and 251.4MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. 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] [L7392] CALL aws_linked_list_rend_harness() [L7376] struct aws_linked_list list; [L7378] CALL ensure_linked_list_is_allocated(&list, 20) [L6755] CALL, EXPR nondet_uint64_t() VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L266] return __VERIFIER_nondet_ulong(); [L6755] RET, EXPR nondet_uint64_t() VAL [\old(max_length)=20, list={6:0}, list={6:0}, max_length=20, nondet_uint64_t()=-18446744073709551616, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6755] size_t length = nondet_uint64_t(); [L6756] CALL assume_abort_if_not(length <= max_length) 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] [L6756] RET assume_abort_if_not(length <= max_length) VAL [\old(max_length)=20, length=0, list={6:0}, list={6:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6758-L6759] list->head.prev = ((void *)0) [L6761-L6762] list->tail.next = ((void *)0) [L6765] struct aws_linked_list_node *curr = &list->head; [L6767] size_t i = 0; VAL [\old(max_length)=20, curr={6:0}, i=0, length=0, list={6:0}, list={6:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6767] COND FALSE !(i < length) VAL [\old(max_length)=20, curr={6:0}, i=0, length=0, list={6:0}, list={6:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6776] curr->next = &list->tail [L6777] list->tail.prev = curr VAL [\old(max_length)=20, curr={6:0}, i=0, length=0, list={6:0}, list={6:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7378] RET ensure_linked_list_is_allocated(&list, 20) [L7381] CALL, EXPR aws_linked_list_is_valid(&list) VAL [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); [L7381] RET, EXPR aws_linked_list_is_valid(&list) VAL [aws_linked_list_is_valid(&list)=1, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7381] CALL assume_abort_if_not(aws_linked_list_is_valid(&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] [L7381] RET assume_abort_if_not(aws_linked_list_is_valid(&list)) VAL [aws_linked_list_is_valid(&list)=1, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7386] CALL aws_linked_list_rend(&list) [L4824] CALL, EXPR aws_linked_list_is_valid(list) VAL [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); [L4824] 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] [L4824] CALL assume_abort_if_not((aws_linked_list_is_valid(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] [L4824] RET assume_abort_if_not((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] [L4825] const struct aws_linked_list_node *rval = &list->head; VAL [list={6:0}, list={6:0}, rval={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4826] CALL, EXPR aws_linked_list_is_valid(list) VAL [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); [L4826] RET, EXPR aws_linked_list_is_valid(list) VAL [aws_linked_list_is_valid(list)=1, list={6:0}, list={6:0}, rval={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4826] 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 6 procedures, 68 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 202.1s, OverallIterations: 23, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 154.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 56 mSolverCounterUnknown, 3606 SdHoareTripleChecker+Valid, 120.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3579 mSDsluCounter, 13168 SdHoareTripleChecker+Invalid, 119.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 261 IncrementalHoareTripleChecker+Unchecked, 11366 mSDsCounter, 1487 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9788 IncrementalHoareTripleChecker+Invalid, 11592 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1487 mSolverCounterUnsat, 1802 mSDtfsCounter, 9788 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3343 GetRequests, 2793 SyntacticMatches, 33 SemanticMatches, 517 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5559 ImplicationChecksByTransitivity, 58.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=910occurred in iteration=18, InterpolantAutomatonStates: 287, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 22 MinimizatonAttempts, 1090 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 39.0s InterpolantComputationTime, 4027 NumberOfCodeBlocks, 3957 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 4510 ConstructedInterpolants, 338 QuantifiedInterpolants, 20488 SizeOfPredicates, 212 NumberOfNonLiveVariables, 8428 ConjunctsInSsa, 573 ConjunctsInUnsatCore, 48 InterpolantComputations, 17 PerfectInterpolantSequences, 2268/3044 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 19:15:49,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a271723-eafa-45a3-bf00-051795c92b99/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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