./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_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_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3ba29ed0ea5bde1c07cf705bd33e08dacbfc25aab71db15674357fa4d073316b --- 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 [2022-12-14 11:04:59,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:04:59,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:04:59,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:04:59,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:04:59,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:04:59,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:04:59,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:04:59,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:04:59,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:04:59,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:04:59,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:04:59,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:04:59,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:04:59,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:04:59,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:04:59,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:04:59,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:04:59,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:04:59,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:04:59,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:04:59,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:04:59,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:04:59,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:04:59,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:04:59,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:04:59,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:04:59,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:04:59,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:04:59,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:04:59,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:04:59,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:04:59,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:04:59,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:04:59,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:04:59,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:04:59,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:04:59,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:04:59,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:04:59,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:04:59,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:04:59,529 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 11:04:59,557 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:04:59,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:04:59,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:04:59,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:04:59,558 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:04:59,558 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:04:59,558 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:04:59,558 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:04:59,558 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:04:59,558 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:04:59,558 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:04:59,558 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:04:59,558 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:04:59,558 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:04:59,558 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:04:59,559 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:04:59,559 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:04:59,559 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:04:59,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:04:59,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:04:59,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:04:59,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:04:59,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:04:59,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:04:59,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:04:59,560 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:04:59,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:04:59,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:04:59,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:04:59,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:04:59,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:04:59,560 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:04:59,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:04:59,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:04:59,561 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:04:59,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:04:59,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:04:59,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:04:59,561 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ba29ed0ea5bde1c07cf705bd33e08dacbfc25aab71db15674357fa4d073316b [2022-12-14 11:04:59,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:04:59,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:04:59,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:04:59,737 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:04:59,737 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:04:59,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness_negated.i [2022-12-14 11:05:02,322 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:05:02,583 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:05:02,583 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness_negated.i [2022-12-14 11:05:02,599 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/data/552ee201d/6fb0dfc1f7cd49de85d2950f288a3ce2/FLAGb116ce0d4 [2022-12-14 11:05:02,885 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/data/552ee201d/6fb0dfc1f7cd49de85d2950f288a3ce2 [2022-12-14 11:05:02,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:05:02,888 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:05:02,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:05:02,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:05:02,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:05:02,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:05:02" (1/1) ... [2022-12-14 11:05:02,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b6b2b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:05:02, skipping insertion in model container [2022-12-14 11:05:02,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:05:02" (1/1) ... [2022-12-14 11:05:02,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:05:02,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:05:03,115 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_a087d5d6-276e-4970-9df1-6aff450b3808/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness_negated.i[4494,4507] [2022-12-14 11:05:03,121 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_a087d5d6-276e-4970-9df1-6aff450b3808/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness_negated.i[4554,4567] [2022-12-14 11:05:03,675 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 11:05:03,680 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:03,681 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:03,681 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:03,682 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:03,682 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:03,692 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:03,692 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:03,702 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:03,703 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:03,705 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:03,705 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:03,706 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:03,706 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:03,755 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 11:05:03,756 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 11:05:03,756 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 11:05:03,759 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 11:05:03,761 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 11:05:03,761 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 11:05:03,944 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 11:05:03,945 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 11:05:03,946 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 11:05:03,947 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 11:05:03,948 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 11:05:03,949 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 11:05:03,950 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 11:05:03,950 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 11:05:03,951 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 11:05:03,951 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 11:05:03,951 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 11:05:04,055 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 11:05:04,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:05:04,085 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:05:04,094 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_a087d5d6-276e-4970-9df1-6aff450b3808/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness_negated.i[4494,4507] [2022-12-14 11:05:04,095 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_a087d5d6-276e-4970-9df1-6aff450b3808/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness_negated.i[4554,4567] [2022-12-14 11:05:04,123 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 11:05:04,125 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:04,126 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:04,126 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:04,127 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:04,127 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:04,133 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:04,133 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:04,134 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:04,135 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:04,136 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:04,136 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:04,137 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:04,137 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 11:05:04,143 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 11:05:04,143 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 11:05:04,144 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 11:05:04,147 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 11:05:04,148 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 11:05:04,148 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 11:05:04,168 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 11:05:04,168 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 11:05:04,169 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 11:05:04,170 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 11:05:04,170 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 11:05:04,171 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 11:05:04,172 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 11:05:04,172 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 11:05:04,173 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 11:05:04,173 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 11:05:04,173 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 11:05:04,192 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 11:05:04,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:05:04,377 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:05:04,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:05:04 WrapperNode [2022-12-14 11:05:04,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:05:04,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:05:04,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:05:04,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:05:04,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:05:04" (1/1) ... [2022-12-14 11:05:04,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:05:04" (1/1) ... [2022-12-14 11:05:04,456 INFO L138 Inliner]: procedures = 679, calls = 1044, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 133 [2022-12-14 11:05:04,456 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:05:04,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:05:04,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:05:04,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:05:04,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:05:04" (1/1) ... [2022-12-14 11:05:04,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:05:04" (1/1) ... [2022-12-14 11:05:04,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:05:04" (1/1) ... [2022-12-14 11:05:04,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:05:04" (1/1) ... [2022-12-14 11:05:04,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:05:04" (1/1) ... [2022-12-14 11:05:04,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:05:04" (1/1) ... [2022-12-14 11:05:04,489 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:05:04" (1/1) ... [2022-12-14 11:05:04,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:05:04" (1/1) ... [2022-12-14 11:05:04,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:05:04,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:05:04,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:05:04,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:05:04,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:05:04" (1/1) ... [2022-12-14 11:05:04,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:05:04,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:05:04,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:05:04,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:05:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_back [2022-12-14 11:05:04,555 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_back [2022-12-14 11:05:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:05:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 11:05:04,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 11:05:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-14 11:05:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-14 11:05:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 11:05:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-14 11:05:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-14 11:05:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:05:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 11:05:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:05:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:05:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-12-14 11:05:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-12-14 11:05:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 11:05:04,557 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 11:05:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 11:05:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 11:05:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 11:05:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-14 11:05:04,557 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-14 11:05:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-12-14 11:05:04,557 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-12-14 11:05:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:05:04,748 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:05:04,749 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:05:04,943 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:05:05,017 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:05:05,017 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 11:05:05,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:05:05 BoogieIcfgContainer [2022-12-14 11:05:05,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:05:05,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:05:05,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:05:05,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:05:05,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:05:02" (1/3) ... [2022-12-14 11:05:05,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dcc55b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:05:05, skipping insertion in model container [2022-12-14 11:05:05,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:05:04" (2/3) ... [2022-12-14 11:05:05,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dcc55b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:05:05, skipping insertion in model container [2022-12-14 11:05:05,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:05:05" (3/3) ... [2022-12-14 11:05:05,025 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_back_harness_negated.i [2022-12-14 11:05:05,039 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:05:05,039 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:05:05,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:05:05,077 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d2f144f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:05:05,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:05:05,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 11:05:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 11:05:05,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:05:05,087 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2022-12-14 11:05:05,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:05:05,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:05:05,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1804867593, now seen corresponding path program 1 times [2022-12-14 11:05:05,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:05:05,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824221224] [2022-12-14 11:05:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:05,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:05:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 11:05:05,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:05:05,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824221224] [2022-12-14 11:05:05,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824221224] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:05:05,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444640161] [2022-12-14 11:05:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:05,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:05:05,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:05:05,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:05:05,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:05:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:05,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:05:05,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:05:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:05:05,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:05:05,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444640161] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:05:05,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:05:05,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2022-12-14 11:05:05,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172254460] [2022-12-14 11:05:05,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:05:05,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:05:05,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:05:05,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:05:05,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:05:05,836 INFO L87 Difference]: Start difference. First operand has 69 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 5 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 11:05:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:05:05,964 INFO L93 Difference]: Finished difference Result 126 states and 174 transitions. [2022-12-14 11:05:05,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:05:05,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 52 [2022-12-14 11:05:05,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:05:05,975 INFO L225 Difference]: With dead ends: 126 [2022-12-14 11:05:05,975 INFO L226 Difference]: Without dead ends: 69 [2022-12-14 11:05:05,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:05:05,980 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:05:05,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 279 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:05:05,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-14 11:05:06,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-12-14 11:05:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-12-14 11:05:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2022-12-14 11:05:06,021 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 52 [2022-12-14 11:05:06,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:05:06,021 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2022-12-14 11:05:06,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 11:05:06,022 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2022-12-14 11:05:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 11:05:06,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:05:06,024 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2022-12-14 11:05:06,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:05:06,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 11:05:06,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:05:06,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:05:06,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1481967309, now seen corresponding path program 1 times [2022-12-14 11:05:06,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:05:06,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140488871] [2022-12-14 11:05:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:06,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:05:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 11:05:06,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:05:06,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140488871] [2022-12-14 11:05:06,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140488871] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:05:06,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620655676] [2022-12-14 11:05:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:06,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:05:06,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:05:06,526 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:05:06,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:05:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:06,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:05:06,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:05:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:05:06,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:05:06,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620655676] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:05:06,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:05:06,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-14 11:05:06,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268629315] [2022-12-14 11:05:06,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:05:06,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:05:06,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:05:06,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:05:06,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:05:06,761 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 11:05:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:05:06,934 INFO L93 Difference]: Finished difference Result 127 states and 168 transitions. [2022-12-14 11:05:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:05:06,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 54 [2022-12-14 11:05:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:05:06,936 INFO L225 Difference]: With dead ends: 127 [2022-12-14 11:05:06,936 INFO L226 Difference]: Without dead ends: 69 [2022-12-14 11:05:06,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:05:06,938 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 43 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:05:06,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 378 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:05:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-14 11:05:06,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-12-14 11:05:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-12-14 11:05:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2022-12-14 11:05:06,949 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 54 [2022-12-14 11:05:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:05:06,949 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2022-12-14 11:05:06,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 11:05:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2022-12-14 11:05:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 11:05:06,951 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:05:06,951 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2022-12-14 11:05:06,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:05:07,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:05:07,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:05:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:05:07,153 INFO L85 PathProgramCache]: Analyzing trace with hash 645109435, now seen corresponding path program 1 times [2022-12-14 11:05:07,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:05:07,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950909766] [2022-12-14 11:05:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:07,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:05:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 11:05:07,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:05:07,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950909766] [2022-12-14 11:05:07,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950909766] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:05:07,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682334887] [2022-12-14 11:05:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:07,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:05:07,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:05:07,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:05:07,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:05:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:07,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:05:07,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:05:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:05:07,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:05:07,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682334887] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:05:07,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:05:07,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-12-14 11:05:07,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19983207] [2022-12-14 11:05:07,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:05:07,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:05:07,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:05:07,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:05:07,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:05:07,563 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 11:05:07,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:05:07,772 INFO L93 Difference]: Finished difference Result 136 states and 181 transitions. [2022-12-14 11:05:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:05:07,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 56 [2022-12-14 11:05:07,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:05:07,775 INFO L225 Difference]: With dead ends: 136 [2022-12-14 11:05:07,775 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 11:05:07,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:05:07,776 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 71 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:05:07,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 423 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:05:07,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 11:05:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-12-14 11:05:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-12-14 11:05:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2022-12-14 11:05:07,784 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 56 [2022-12-14 11:05:07,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:05:07,784 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2022-12-14 11:05:07,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 11:05:07,784 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2022-12-14 11:05:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 11:05:07,785 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:05:07,785 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:05:07,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:05:07,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:05:07,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:05:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:05:07,989 INFO L85 PathProgramCache]: Analyzing trace with hash 311584288, now seen corresponding path program 1 times [2022-12-14 11:05:07,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:05:07,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372874303] [2022-12-14 11:05:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:07,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:05:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 11:05:08,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:05:08,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372874303] [2022-12-14 11:05:08,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372874303] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:05:08,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063323237] [2022-12-14 11:05:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:08,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:05:08,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:05:08,310 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:05:08,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:05:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:05:08,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:05:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 11:05:08,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:05:08,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063323237] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:05:08,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:05:08,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-12-14 11:05:08,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145477453] [2022-12-14 11:05:08,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:05:08,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:05:08,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:05:08,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:05:08,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:05:08,462 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 11:05:08,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:05:08,508 INFO L93 Difference]: Finished difference Result 132 states and 177 transitions. [2022-12-14 11:05:08,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:05:08,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 57 [2022-12-14 11:05:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:05:08,510 INFO L225 Difference]: With dead ends: 132 [2022-12-14 11:05:08,511 INFO L226 Difference]: Without dead ends: 76 [2022-12-14 11:05:08,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:05:08,512 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:05:08,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 148 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:05:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-14 11:05:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2022-12-14 11:05:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-12-14 11:05:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2022-12-14 11:05:08,519 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 57 [2022-12-14 11:05:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:05:08,519 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2022-12-14 11:05:08,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 11:05:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2022-12-14 11:05:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 11:05:08,520 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:05:08,520 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:05:08,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:05:08,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:05:08,721 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:05:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:05:08,722 INFO L85 PathProgramCache]: Analyzing trace with hash 555400928, now seen corresponding path program 1 times [2022-12-14 11:05:08,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:05:08,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521095413] [2022-12-14 11:05:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:08,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:05:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 11:05:08,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:05:08,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521095413] [2022-12-14 11:05:08,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521095413] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:05:08,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356745100] [2022-12-14 11:05:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:08,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:05:08,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:05:08,934 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:05:08,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:05:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:09,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:05:09,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:05:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 11:05:09,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:05:09,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356745100] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:05:09,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:05:09,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 11:05:09,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931330530] [2022-12-14 11:05:09,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:05:09,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:05:09,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:05:09,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:05:09,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:05:09,094 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand has 6 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 11:05:09,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:05:09,189 INFO L93 Difference]: Finished difference Result 131 states and 170 transitions. [2022-12-14 11:05:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:05:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 60 [2022-12-14 11:05:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:05:09,191 INFO L225 Difference]: With dead ends: 131 [2022-12-14 11:05:09,191 INFO L226 Difference]: Without dead ends: 74 [2022-12-14 11:05:09,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:05:09,192 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:05:09,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 345 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:05:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-14 11:05:09,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-12-14 11:05:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-12-14 11:05:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2022-12-14 11:05:09,198 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 60 [2022-12-14 11:05:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:05:09,199 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2022-12-14 11:05:09,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 11:05:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2022-12-14 11:05:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 11:05:09,199 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:05:09,200 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:05:09,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:05:09,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:05:09,401 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:05:09,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:05:09,402 INFO L85 PathProgramCache]: Analyzing trace with hash 50898216, now seen corresponding path program 1 times [2022-12-14 11:05:09,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:05:09,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093145591] [2022-12-14 11:05:09,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:09,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:05:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 11:05:10,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:05:10,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093145591] [2022-12-14 11:05:10,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093145591] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:05:10,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122126416] [2022-12-14 11:05:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:10,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:05:10,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:05:10,070 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:05:10,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:05:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:10,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 11:05:10,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:05:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:05:10,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:05:10,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122126416] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:05:10,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:05:10,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 11:05:10,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90167456] [2022-12-14 11:05:10,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:05:10,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:05:10,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:05:10,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:05:10,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:05:10,260 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 7 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 11:05:10,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:05:10,374 INFO L93 Difference]: Finished difference Result 136 states and 176 transitions. [2022-12-14 11:05:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:05:10,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 62 [2022-12-14 11:05:10,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:05:10,375 INFO L225 Difference]: With dead ends: 136 [2022-12-14 11:05:10,375 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 11:05:10,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:05:10,376 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 6 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:05:10,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 404 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:05:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 11:05:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-12-14 11:05:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-12-14 11:05:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2022-12-14 11:05:10,382 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 62 [2022-12-14 11:05:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:05:10,383 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2022-12-14 11:05:10,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 11:05:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2022-12-14 11:05:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 11:05:10,384 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:05:10,384 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:05:10,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:05:10,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:05:10,586 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:05:10,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:05:10,587 INFO L85 PathProgramCache]: Analyzing trace with hash -929094317, now seen corresponding path program 1 times [2022-12-14 11:05:10,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:05:10,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59354500] [2022-12-14 11:05:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:10,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:05:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 11:05:10,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:05:10,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59354500] [2022-12-14 11:05:10,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59354500] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:05:10,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:05:10,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:05:10,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482148833] [2022-12-14 11:05:10,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:05:10,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:05:10,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:05:10,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:05:10,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:05:10,964 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-12-14 11:05:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:05:11,033 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2022-12-14 11:05:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:05:11,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 63 [2022-12-14 11:05:11,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:05:11,035 INFO L225 Difference]: With dead ends: 83 [2022-12-14 11:05:11,035 INFO L226 Difference]: Without dead ends: 81 [2022-12-14 11:05:11,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:05:11,036 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 5 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:05:11,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 355 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:05:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-14 11:05:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-12-14 11:05:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 46 states have internal predecessors, (49), 25 states have call successors, (25), 9 states have call predecessors, (25), 11 states have return successors, (28), 24 states have call predecessors, (28), 24 states have call successors, (28) [2022-12-14 11:05:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2022-12-14 11:05:11,046 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 63 [2022-12-14 11:05:11,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:05:11,046 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2022-12-14 11:05:11,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-12-14 11:05:11,047 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2022-12-14 11:05:11,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 11:05:11,048 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:05:11,048 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 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] [2022-12-14 11:05:11,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 11:05:11,048 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:05:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:05:11,049 INFO L85 PathProgramCache]: Analyzing trace with hash 815818428, now seen corresponding path program 1 times [2022-12-14 11:05:11,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:05:11,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208475915] [2022-12-14 11:05:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:11,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:05:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 11:05:11,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:05:11,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208475915] [2022-12-14 11:05:11,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208475915] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:05:11,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:05:11,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:05:11,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553767083] [2022-12-14 11:05:11,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:05:11,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:05:11,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:05:11,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:05:11,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:05:11,323 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-12-14 11:05:11,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:05:11,418 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2022-12-14 11:05:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:05:11,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 71 [2022-12-14 11:05:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:05:11,419 INFO L225 Difference]: With dead ends: 91 [2022-12-14 11:05:11,419 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 11:05:11,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:05:11,420 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 7 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:05:11,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 433 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:05:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 11:05:11,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2022-12-14 11:05:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 47 states have internal predecessors, (50), 25 states have call successors, (25), 9 states have call predecessors, (25), 11 states have return successors, (28), 24 states have call predecessors, (28), 24 states have call successors, (28) [2022-12-14 11:05:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2022-12-14 11:05:11,430 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 71 [2022-12-14 11:05:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:05:11,430 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2022-12-14 11:05:11,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-12-14 11:05:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2022-12-14 11:05:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 11:05:11,432 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:05:11,432 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:05:11,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 11:05:11,432 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:05:11,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:05:11,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1873140848, now seen corresponding path program 1 times [2022-12-14 11:05:11,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:05:11,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125850942] [2022-12-14 11:05:11,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:11,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:05:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 11:05:12,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:05:12,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125850942] [2022-12-14 11:05:12,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125850942] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:05:12,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870177914] [2022-12-14 11:05:12,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:05:12,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:05:12,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:05:12,348 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:05:12,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a087d5d6-276e-4970-9df1-6aff450b3808/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:05:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:05:12,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 112 conjunts are in the unsatisfiable core [2022-12-14 11:05:12,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:05:12,607 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 [2022-12-14 11:05:12,610 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 [2022-12-14 11:05:12,615 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 [2022-12-14 11:05:12,618 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 [2022-12-14 11:05:23,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:05:23,128 INFO L321 Elim1Store]: treesize reduction 128, result has 2.3 percent of original size [2022-12-14 11:05:23,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 22 case distinctions, treesize of input 309 treesize of output 155 [2022-12-14 11:05:23,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:05:23,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:05:23,152 INFO L321 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2022-12-14 11:05:23,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 8 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 163 treesize of output 86 [2022-12-14 11:05:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:05:23,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:05:45,148 WARN L233 SmtUtils]: Spent 18.05s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:05:47,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:05:47,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 95686 treesize of output 83573 [2022-12-14 11:06:29,247 WARN L233 SmtUtils]: Spent 40.09s on a formula simplification that was a NOOP. DAG size: 2338 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 11:06:29,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:06:29,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 34 select indices, 34 select index equivalence classes, 0 disjoint index pairs (out of 561 index pairs), introduced 56 new quantified variables, introduced 561 case distinctions, treesize of input 3506532 treesize of output 3042208 [2022-12-14 11:06:52,760 WARN L233 SmtUtils]: Spent 23.49s on a formula simplification that was a NOOP. DAG size: 11619 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 11:07:16,035 WARN L233 SmtUtils]: Spent 22.86s on a formula simplification that was a NOOP. DAG size: 11439 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 11:07:19,055 INFO L217 Elim1Store]: Index analysis took 1331 ms [2022-12-14 11:08:12,929 WARN L233 SmtUtils]: Spent 53.83s on a formula simplification that was a NOOP. DAG size: 962 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 11:08:12,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:08:12,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 22 select indices, 22 select index equivalence classes, 6 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 225 case distinctions, treesize of input 3037856 treesize of output 2690670 [2022-12-14 11:08:43,629 WARN L233 SmtUtils]: Spent 30.68s on a formula simplification that was a NOOP. DAG size: 12300 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 11:08:46,584 INFO L217 Elim1Store]: Index analysis took 1260 ms [2022-12-14 11:09:40,162 WARN L233 SmtUtils]: Spent 53.53s on a formula simplification that was a NOOP. DAG size: 860 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 11:09:40,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:09:40,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 21 select indices, 21 select index equivalence classes, 7 disjoint index pairs (out of 210 index pairs), introduced 28 new quantified variables, introduced 203 case distinctions, treesize of input 3059129 treesize of output 2967995 [2022-12-14 11:11:35,196 WARN L233 SmtUtils]: Spent 1.92m on a formula simplification. DAG size of input: 15418 DAG size of output: 15410 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 11:12:23,625 WARN L233 SmtUtils]: Spent 47.53s on a formula simplification that was a NOOP. DAG size: 15308 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 11:12:46,985 INFO L217 Elim1Store]: Index analysis took 20358 ms [2022-12-14 11:14:08,339 WARN L233 SmtUtils]: Spent 1.35m on a formula simplification that was a NOOP. DAG size: 1441 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 11:14:08,340 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:14:08,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 27 select indices, 27 select index equivalence classes, 7 disjoint index pairs (out of 351 index pairs), introduced 27 new quantified variables, introduced 344 case distinctions, treesize of input 4221135 treesize of output 3709393