./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS --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 de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 --- 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-8393723 [2022-11-19 06:43:15,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:43:15,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:43:15,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:43:15,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:43:15,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:43:15,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:43:15,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:43:15,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:43:15,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:43:15,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:43:15,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:43:15,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:43:15,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:43:15,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:43:15,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:43:15,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:43:15,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:43:15,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:43:15,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:43:15,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:43:15,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:43:15,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:43:15,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:43:15,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:43:15,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:43:15,930 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:43:15,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:43:15,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:43:15,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:43:15,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:43:15,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:43:15,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:43:15,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:43:15,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:43:15,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:43:15,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:43:15,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:43:15,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:43:15,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:43:15,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:43:15,944 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 06:43:15,981 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:43:15,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:43:15,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:43:15,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:43:15,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:43:15,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:43:15,984 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:43:15,984 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:43:15,984 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:43:15,984 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:43:15,985 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:43:15,985 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:43:15,985 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:43:15,985 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:43:15,986 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:43:15,986 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:43:15,986 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:43:15,986 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:43:15,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:43:15,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:43:15,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:43:15,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:43:15,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:43:15,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:43:15,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:43:15,989 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:43:15,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:43:15,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:43:15,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:43:15,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:43:15,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:43:15,991 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:43:15,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:43:15,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:43:15,991 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:43:15,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:43:15,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:43:15,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:43:15,992 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_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 [2022-11-19 06:43:16,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:43:16,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:43:16,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:43:16,354 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:43:16,355 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:43:16,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2022-11-19 06:43:16,431 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/data/bfa4473c3/c929120ca0a94d169fc4563756295616/FLAG745eb3532 [2022-11-19 06:43:17,280 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:43:17,281 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2022-11-19 06:43:17,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/data/bfa4473c3/c929120ca0a94d169fc4563756295616/FLAG745eb3532 [2022-11-19 06:43:17,777 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/data/bfa4473c3/c929120ca0a94d169fc4563756295616 [2022-11-19 06:43:17,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:43:17,781 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:43:17,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:43:17,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:43:17,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:43:17,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@225425cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17, skipping insertion in model container [2022-11-19 06:43:17,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:43:17,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:43:18,213 WARN L234 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_3493b899-9dab-4069-a27c-6f87916015d9/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2022-11-19 06:43:18,223 WARN L234 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_3493b899-9dab-4069-a27c-6f87916015d9/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2022-11-19 06:43:19,272 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:19,273 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:19,274 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:19,274 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:19,276 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:19,290 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:19,298 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:19,307 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:19,308 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:19,806 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 06:43:19,807 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 06:43:19,809 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 06:43:19,810 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 06:43:19,812 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 06:43:19,812 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 06:43:19,813 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 06:43:19,817 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 06:43:19,820 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 06:43:19,821 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 06:43:20,082 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 06:43:20,125 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,127 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,235 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,236 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:43:20,347 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:43:20,361 WARN L234 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_3493b899-9dab-4069-a27c-6f87916015d9/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2022-11-19 06:43:20,362 WARN L234 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_3493b899-9dab-4069-a27c-6f87916015d9/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2022-11-19 06:43:20,397 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,397 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,398 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,398 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,399 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,406 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,407 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,408 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,409 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,440 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 06:43:20,441 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 06:43:20,442 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 06:43:20,443 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 06:43:20,444 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 06:43:20,445 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 06:43:20,445 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 06:43:20,446 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 06:43:20,447 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 06:43:20,447 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 06:43:20,488 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 06:43:20,501 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,501 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,543 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,544 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:43:20,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:43:20,839 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:43:20,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:20 WrapperNode [2022-11-19 06:43:20,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:43:20,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:43:20,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:43:20,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:43:20,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:20" (1/1) ... [2022-11-19 06:43:20,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:20" (1/1) ... [2022-11-19 06:43:21,097 INFO L138 Inliner]: procedures = 692, calls = 2620, calls flagged for inlining = 60, calls inlined = 10, statements flattened = 956 [2022-11-19 06:43:21,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:43:21,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:43:21,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:43:21,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:43:21,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:20" (1/1) ... [2022-11-19 06:43:21,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:20" (1/1) ... [2022-11-19 06:43:21,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:20" (1/1) ... [2022-11-19 06:43:21,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:20" (1/1) ... [2022-11-19 06:43:21,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:20" (1/1) ... [2022-11-19 06:43:21,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:20" (1/1) ... [2022-11-19 06:43:21,161 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:20" (1/1) ... [2022-11-19 06:43:21,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:20" (1/1) ... [2022-11-19 06:43:21,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:43:21,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:43:21,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:43:21,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:43:21,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:20" (1/1) ... [2022-11-19 06:43:21,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:43:21,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:21,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:43:21,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:43:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-19 06:43:21,287 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-19 06:43:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:43:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-19 06:43:21,287 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-19 06:43:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:43:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-19 06:43:21,288 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-19 06:43:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 06:43:21,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 06:43:21,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:43:21,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:43:21,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 06:43:21,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:43:21,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:43:21,290 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-19 06:43:21,290 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-19 06:43:21,290 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2022-11-19 06:43:21,291 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2022-11-19 06:43:21,291 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_reserve [2022-11-19 06:43:21,291 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_reserve [2022-11-19 06:43:21,291 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-11-19 06:43:21,292 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-11-19 06:43:21,292 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 06:43:21,292 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 06:43:21,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:43:21,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 06:43:21,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 06:43:21,293 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-19 06:43:21,293 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-19 06:43:21,293 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-19 06:43:21,293 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-19 06:43:21,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:43:21,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:43:21,696 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:43:21,698 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:43:23,131 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:43:23,425 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:43:23,425 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 06:43:23,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:43:23 BoogieIcfgContainer [2022-11-19 06:43:23,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:43:23,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:43:23,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:43:23,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:43:23,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:43:17" (1/3) ... [2022-11-19 06:43:23,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dc4de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:43:23, skipping insertion in model container [2022-11-19 06:43:23,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:20" (2/3) ... [2022-11-19 06:43:23,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dc4de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:43:23, skipping insertion in model container [2022-11-19 06:43:23,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:43:23" (3/3) ... [2022-11-19 06:43:23,440 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_harness.i [2022-11-19 06:43:23,459 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:43:23,460 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:43:23,512 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:43:23,518 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;@2480bf3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:43:23,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:43:23,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-19 06:43:23,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 06:43:23,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:23,532 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:23,533 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:23,538 INFO L85 PathProgramCache]: Analyzing trace with hash -355170412, now seen corresponding path program 1 times [2022-11-19 06:43:23,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:23,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850248810] [2022-11-19 06:43:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:23,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:43:24,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:24,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850248810] [2022-11-19 06:43:24,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850248810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:24,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:24,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:43:24,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444033132] [2022-11-19 06:43:24,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:24,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 06:43:24,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:24,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 06:43:24,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:43:24,306 INFO L87 Difference]: Start difference. First operand has 116 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 06:43:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:24,492 INFO L93 Difference]: Finished difference Result 215 states and 303 transitions. [2022-11-19 06:43:24,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 06:43:24,498 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2022-11-19 06:43:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:24,511 INFO L225 Difference]: With dead ends: 215 [2022-11-19 06:43:24,512 INFO L226 Difference]: Without dead ends: 112 [2022-11-19 06:43:24,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:43:24,530 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:24,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 138 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:24,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-19 06:43:24,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-11-19 06:43:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 64 states have internal predecessors, (74), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-19 06:43:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 147 transitions. [2022-11-19 06:43:24,613 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 147 transitions. Word has length 34 [2022-11-19 06:43:24,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:24,615 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 147 transitions. [2022-11-19 06:43:24,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 06:43:24,615 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2022-11-19 06:43:24,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 06:43:24,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:24,618 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:24,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:43:24,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash -424375952, now seen corresponding path program 1 times [2022-11-19 06:43:24,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:24,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089528768] [2022-11-19 06:43:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:24,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:43:25,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:25,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089528768] [2022-11-19 06:43:25,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089528768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:25,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:25,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:43:25,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156434188] [2022-11-19 06:43:25,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:25,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:43:25,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:25,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:43:25,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:43:25,276 INFO L87 Difference]: Start difference. First operand 112 states and 147 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 06:43:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:25,774 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2022-11-19 06:43:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:43:25,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 37 [2022-11-19 06:43:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:25,777 INFO L225 Difference]: With dead ends: 151 [2022-11-19 06:43:25,777 INFO L226 Difference]: Without dead ends: 116 [2022-11-19 06:43:25,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:43:25,779 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 0 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:25,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 640 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:43:25,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-19 06:43:25,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-19 06:43:25,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 67 states have internal predecessors, (77), 37 states have call successors, (37), 11 states have call predecessors, (37), 12 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2022-11-19 06:43:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 151 transitions. [2022-11-19 06:43:25,793 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 151 transitions. Word has length 37 [2022-11-19 06:43:25,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:25,794 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 151 transitions. [2022-11-19 06:43:25,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 06:43:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 151 transitions. [2022-11-19 06:43:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 06:43:25,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:25,796 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 06:43:25,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:43:25,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:25,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1641044390, now seen corresponding path program 1 times [2022-11-19 06:43:25,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:25,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475026303] [2022-11-19 06:43:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:25,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:43:37,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475026303] [2022-11-19 06:43:37,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475026303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584927790] [2022-11-19 06:43:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:37,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:37,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:37,318 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:37,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:43:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:37,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-19 06:43:37,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:38,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:43:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:45,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:43:45,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584927790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:45,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:43:45,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [15] total 26 [2022-11-19 06:43:45,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215663027] [2022-11-19 06:43:45,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:45,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 06:43:45,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:45,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 06:43:45,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-11-19 06:43:45,529 INFO L87 Difference]: Start difference. First operand 116 states and 151 transitions. Second operand has 17 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-19 06:43:48,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:48,304 INFO L93 Difference]: Finished difference Result 156 states and 198 transitions. [2022-11-19 06:43:48,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 06:43:48,304 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 40 [2022-11-19 06:43:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:48,307 INFO L225 Difference]: With dead ends: 156 [2022-11-19 06:43:48,307 INFO L226 Difference]: Without dead ends: 154 [2022-11-19 06:43:48,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 06:43:48,309 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 67 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 501 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:48,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 946 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 794 Invalid, 0 Unknown, 501 Unchecked, 2.5s Time] [2022-11-19 06:43:48,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-19 06:43:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-11-19 06:43:48,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 90 states have internal predecessors, (102), 45 states have call successors, (45), 15 states have call predecessors, (45), 19 states have return successors, (48), 47 states have call predecessors, (48), 44 states have call successors, (48) [2022-11-19 06:43:48,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 195 transitions. [2022-11-19 06:43:48,347 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 195 transitions. Word has length 40 [2022-11-19 06:43:48,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:48,348 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 195 transitions. [2022-11-19 06:43:48,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-19 06:43:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 195 transitions. [2022-11-19 06:43:48,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 06:43:48,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:48,355 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:48,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 06:43:48,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:48,566 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:48,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:48,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1273911064, now seen corresponding path program 1 times [2022-11-19 06:43:48,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:48,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848880087] [2022-11-19 06:43:48,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:48,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 06:43:51,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:51,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848880087] [2022-11-19 06:43:51,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848880087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:51,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:51,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 06:43:51,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081317963] [2022-11-19 06:43:51,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:51,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:43:51,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:51,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:43:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:43:51,338 INFO L87 Difference]: Start difference. First operand 153 states and 195 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-19 06:43:52,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:52,733 INFO L93 Difference]: Finished difference Result 312 states and 402 transitions. [2022-11-19 06:43:52,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:43:52,734 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 40 [2022-11-19 06:43:52,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:52,737 INFO L225 Difference]: With dead ends: 312 [2022-11-19 06:43:52,737 INFO L226 Difference]: Without dead ends: 184 [2022-11-19 06:43:52,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:43:52,739 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 48 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:52,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 735 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 06:43:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-19 06:43:52,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 167. [2022-11-19 06:43:52,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 99 states have internal predecessors, (110), 50 states have call successors, (50), 16 states have call predecessors, (50), 20 states have return successors, (53), 51 states have call predecessors, (53), 49 states have call successors, (53) [2022-11-19 06:43:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 213 transitions. [2022-11-19 06:43:52,767 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 213 transitions. Word has length 40 [2022-11-19 06:43:52,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:52,767 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 213 transitions. [2022-11-19 06:43:52,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-19 06:43:52,768 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 213 transitions. [2022-11-19 06:43:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 06:43:52,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:52,770 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:52,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:43:52,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash 180781588, now seen corresponding path program 1 times [2022-11-19 06:43:52,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:52,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045769259] [2022-11-19 06:43:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:52,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:44:06,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:06,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045769259] [2022-11-19 06:44:06,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045769259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:06,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448414333] [2022-11-19 06:44:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:06,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:06,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:06,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:06,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:44:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:06,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 2457 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-19 06:44:06,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:07,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:44:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:44:13,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:44:13,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448414333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:13,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:44:13,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [19] total 31 [2022-11-19 06:44:13,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085647111] [2022-11-19 06:44:13,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:13,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 06:44:13,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:13,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 06:44:13,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-11-19 06:44:13,882 INFO L87 Difference]: Start difference. First operand 167 states and 213 transitions. Second operand has 17 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:44:15,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:15,773 INFO L93 Difference]: Finished difference Result 198 states and 248 transitions. [2022-11-19 06:44:15,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 06:44:15,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2022-11-19 06:44:15,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:15,777 INFO L225 Difference]: With dead ends: 198 [2022-11-19 06:44:15,777 INFO L226 Difference]: Without dead ends: 196 [2022-11-19 06:44:15,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 06:44:15,782 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 44 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:15,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1310 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 561 Invalid, 0 Unknown, 210 Unchecked, 1.7s Time] [2022-11-19 06:44:15,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-19 06:44:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 175. [2022-11-19 06:44:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 104 states have internal predecessors, (115), 50 states have call successors, (50), 19 states have call predecessors, (50), 23 states have return successors, (53), 51 states have call predecessors, (53), 49 states have call successors, (53) [2022-11-19 06:44:15,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 218 transitions. [2022-11-19 06:44:15,816 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 218 transitions. Word has length 44 [2022-11-19 06:44:15,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:15,817 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 218 transitions. [2022-11-19 06:44:15,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:44:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 218 transitions. [2022-11-19 06:44:15,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 06:44:15,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:15,820 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 06:44:15,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:16,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:16,035 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:16,036 INFO L85 PathProgramCache]: Analyzing trace with hash 255889020, now seen corresponding path program 1 times [2022-11-19 06:44:16,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:16,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312722200] [2022-11-19 06:44:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:16,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:44:16,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:16,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312722200] [2022-11-19 06:44:16,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312722200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:16,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:16,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:44:16,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53812289] [2022-11-19 06:44:16,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:16,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:44:16,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:44:16,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:16,347 INFO L87 Difference]: Start difference. First operand 175 states and 218 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-19 06:44:16,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:16,704 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2022-11-19 06:44:16,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:44:16,705 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) Word has length 46 [2022-11-19 06:44:16,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:16,706 INFO L225 Difference]: With dead ends: 222 [2022-11-19 06:44:16,706 INFO L226 Difference]: Without dead ends: 183 [2022-11-19 06:44:16,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:16,708 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 0 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:16,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 656 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:44:16,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-19 06:44:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 175. [2022-11-19 06:44:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 104 states have internal predecessors, (115), 50 states have call successors, (50), 19 states have call predecessors, (50), 23 states have return successors, (53), 51 states have call predecessors, (53), 49 states have call successors, (53) [2022-11-19 06:44:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 218 transitions. [2022-11-19 06:44:16,730 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 218 transitions. Word has length 46 [2022-11-19 06:44:16,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:16,731 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 218 transitions. [2022-11-19 06:44:16,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-19 06:44:16,731 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 218 transitions. [2022-11-19 06:44:16,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 06:44:16,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:16,732 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 06:44:16,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:44:16,733 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:16,733 INFO L85 PathProgramCache]: Analyzing trace with hash -452361234, now seen corresponding path program 1 times [2022-11-19 06:44:16,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:16,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172479282] [2022-11-19 06:44:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:16,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:44:17,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:17,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172479282] [2022-11-19 06:44:17,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172479282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:17,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:17,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 06:44:17,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591394903] [2022-11-19 06:44:17,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:17,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:44:17,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:17,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:44:17,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:44:17,803 INFO L87 Difference]: Start difference. First operand 175 states and 218 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 06:44:18,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:18,920 INFO L93 Difference]: Finished difference Result 194 states and 241 transitions. [2022-11-19 06:44:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:44:18,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 46 [2022-11-19 06:44:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:18,923 INFO L225 Difference]: With dead ends: 194 [2022-11-19 06:44:18,923 INFO L226 Difference]: Without dead ends: 192 [2022-11-19 06:44:18,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:44:18,924 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 63 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:18,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 387 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 06:44:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-19 06:44:18,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2022-11-19 06:44:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 105 states have (on average 1.1333333333333333) internal successors, (119), 108 states have internal predecessors, (119), 51 states have call successors, (51), 20 states have call predecessors, (51), 24 states have return successors, (54), 52 states have call predecessors, (54), 50 states have call successors, (54) [2022-11-19 06:44:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 224 transitions. [2022-11-19 06:44:18,965 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 224 transitions. Word has length 46 [2022-11-19 06:44:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:18,965 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 224 transitions. [2022-11-19 06:44:18,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 06:44:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 224 transitions. [2022-11-19 06:44:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 06:44:18,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:18,976 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:18,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 06:44:18,977 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:18,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1055566720, now seen corresponding path program 1 times [2022-11-19 06:44:18,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:18,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312175088] [2022-11-19 06:44:18,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:18,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 06:44:19,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:19,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312175088] [2022-11-19 06:44:19,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312175088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:19,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:19,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 06:44:19,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476303986] [2022-11-19 06:44:19,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:19,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:44:19,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:19,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:44:19,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:44:19,808 INFO L87 Difference]: Start difference. First operand 181 states and 224 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 06:44:20,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:20,898 INFO L93 Difference]: Finished difference Result 198 states and 244 transitions. [2022-11-19 06:44:20,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:44:20,899 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 52 [2022-11-19 06:44:20,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:20,901 INFO L225 Difference]: With dead ends: 198 [2022-11-19 06:44:20,902 INFO L226 Difference]: Without dead ends: 196 [2022-11-19 06:44:20,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:44:20,903 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 62 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:20,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 378 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 06:44:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-19 06:44:20,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 187. [2022-11-19 06:44:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 109 states have (on average 1.128440366972477) internal successors, (123), 112 states have internal predecessors, (123), 52 states have call successors, (52), 21 states have call predecessors, (52), 25 states have return successors, (55), 53 states have call predecessors, (55), 51 states have call successors, (55) [2022-11-19 06:44:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 230 transitions. [2022-11-19 06:44:20,931 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 230 transitions. Word has length 52 [2022-11-19 06:44:20,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:20,931 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 230 transitions. [2022-11-19 06:44:20,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 06:44:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 230 transitions. [2022-11-19 06:44:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 06:44:20,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:20,934 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:20,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 06:44:20,934 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:20,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:20,935 INFO L85 PathProgramCache]: Analyzing trace with hash -501670539, now seen corresponding path program 1 times [2022-11-19 06:44:20,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:20,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318618972] [2022-11-19 06:44:20,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:20,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 06:44:24,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:24,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318618972] [2022-11-19 06:44:24,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318618972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:24,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:24,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-19 06:44:24,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085309352] [2022-11-19 06:44:24,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:24,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:44:24,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:24,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:44:24,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:44:24,327 INFO L87 Difference]: Start difference. First operand 187 states and 230 transitions. Second operand has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 06:44:26,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:26,757 INFO L93 Difference]: Finished difference Result 208 states and 257 transitions. [2022-11-19 06:44:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 06:44:26,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 54 [2022-11-19 06:44:26,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:26,760 INFO L225 Difference]: With dead ends: 208 [2022-11-19 06:44:26,760 INFO L226 Difference]: Without dead ends: 206 [2022-11-19 06:44:26,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:44:26,762 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 112 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:26,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 556 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-19 06:44:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-19 06:44:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 191. [2022-11-19 06:44:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 112 states have (on average 1.125) internal successors, (126), 115 states have internal predecessors, (126), 52 states have call successors, (52), 22 states have call predecessors, (52), 26 states have return successors, (55), 53 states have call predecessors, (55), 51 states have call successors, (55) [2022-11-19 06:44:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 233 transitions. [2022-11-19 06:44:26,798 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 233 transitions. Word has length 54 [2022-11-19 06:44:26,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:26,798 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 233 transitions. [2022-11-19 06:44:26,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 06:44:26,799 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 233 transitions. [2022-11-19 06:44:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-19 06:44:26,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:26,801 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:26,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 06:44:26,801 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1986068748, now seen corresponding path program 1 times [2022-11-19 06:44:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:26,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461570010] [2022-11-19 06:44:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:26,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:44:28,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:28,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461570010] [2022-11-19 06:44:28,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461570010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:28,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:28,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 06:44:28,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016331650] [2022-11-19 06:44:28,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:28,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:44:28,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:28,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:44:28,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:44:28,686 INFO L87 Difference]: Start difference. First operand 191 states and 233 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 06:44:30,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:30,558 INFO L93 Difference]: Finished difference Result 206 states and 250 transitions. [2022-11-19 06:44:30,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:44:30,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 59 [2022-11-19 06:44:30,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:30,560 INFO L225 Difference]: With dead ends: 206 [2022-11-19 06:44:30,560 INFO L226 Difference]: Without dead ends: 204 [2022-11-19 06:44:30,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:44:30,561 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 66 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:30,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 411 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-19 06:44:30,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-19 06:44:30,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 198. [2022-11-19 06:44:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 120 states have internal predecessors, (131), 53 states have call successors, (53), 23 states have call predecessors, (53), 27 states have return successors, (56), 54 states have call predecessors, (56), 52 states have call successors, (56) [2022-11-19 06:44:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 240 transitions. [2022-11-19 06:44:30,590 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 240 transitions. Word has length 59 [2022-11-19 06:44:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:30,590 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 240 transitions. [2022-11-19 06:44:30,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 06:44:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 240 transitions. [2022-11-19 06:44:30,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 06:44:30,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:30,592 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:30,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 06:44:30,592 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:30,593 INFO L85 PathProgramCache]: Analyzing trace with hash 322424277, now seen corresponding path program 1 times [2022-11-19 06:44:30,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:30,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238148094] [2022-11-19 06:44:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:30,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 06:44:33,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:33,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238148094] [2022-11-19 06:44:33,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238148094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:33,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:33,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-19 06:44:33,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522528526] [2022-11-19 06:44:33,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:33,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 06:44:33,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:33,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 06:44:33,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-19 06:44:33,262 INFO L87 Difference]: Start difference. First operand 198 states and 240 transitions. Second operand has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-19 06:44:36,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:36,670 INFO L93 Difference]: Finished difference Result 221 states and 269 transitions. [2022-11-19 06:44:36,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 06:44:36,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 64 [2022-11-19 06:44:36,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:36,673 INFO L225 Difference]: With dead ends: 221 [2022-11-19 06:44:36,673 INFO L226 Difference]: Without dead ends: 219 [2022-11-19 06:44:36,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-11-19 06:44:36,674 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 112 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:36,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 762 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-19 06:44:36,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-19 06:44:36,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 202. [2022-11-19 06:44:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 120 states have (on average 1.1166666666666667) internal successors, (134), 123 states have internal predecessors, (134), 53 states have call successors, (53), 24 states have call predecessors, (53), 28 states have return successors, (56), 54 states have call predecessors, (56), 52 states have call successors, (56) [2022-11-19 06:44:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 243 transitions. [2022-11-19 06:44:36,704 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 243 transitions. Word has length 64 [2022-11-19 06:44:36,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:36,705 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 243 transitions. [2022-11-19 06:44:36,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-19 06:44:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 243 transitions. [2022-11-19 06:44:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 06:44:36,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:36,709 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:36,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 06:44:36,709 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:36,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:36,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1272784373, now seen corresponding path program 1 times [2022-11-19 06:44:36,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:36,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111942840] [2022-11-19 06:44:36,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:36,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 06:44:37,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:37,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111942840] [2022-11-19 06:44:37,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111942840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:37,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:37,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:44:37,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422079852] [2022-11-19 06:44:37,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:37,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:44:37,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:37,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:44:37,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:44:37,093 INFO L87 Difference]: Start difference. First operand 202 states and 243 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 06:44:37,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:37,448 INFO L93 Difference]: Finished difference Result 271 states and 329 transitions. [2022-11-19 06:44:37,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:44:37,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2022-11-19 06:44:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:37,451 INFO L225 Difference]: With dead ends: 271 [2022-11-19 06:44:37,451 INFO L226 Difference]: Without dead ends: 220 [2022-11-19 06:44:37,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:44:37,452 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 8 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:37,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 567 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:44:37,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-19 06:44:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 206. [2022-11-19 06:44:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 123 states have (on average 1.113821138211382) internal successors, (137), 126 states have internal predecessors, (137), 53 states have call successors, (53), 24 states have call predecessors, (53), 29 states have return successors, (57), 55 states have call predecessors, (57), 52 states have call successors, (57) [2022-11-19 06:44:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 247 transitions. [2022-11-19 06:44:37,481 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 247 transitions. Word has length 66 [2022-11-19 06:44:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:37,482 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 247 transitions. [2022-11-19 06:44:37,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 06:44:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 247 transitions. [2022-11-19 06:44:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 06:44:37,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:37,483 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:37,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 06:44:37,484 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:37,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1331017075, now seen corresponding path program 1 times [2022-11-19 06:44:37,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:37,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738323361] [2022-11-19 06:44:37,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:37,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-19 06:44:38,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:38,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738323361] [2022-11-19 06:44:38,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738323361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:38,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:38,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:44:38,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554569874] [2022-11-19 06:44:38,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:38,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:44:38,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:38,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:44:38,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:44:38,190 INFO L87 Difference]: Start difference. First operand 206 states and 247 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 06:44:38,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:38,598 INFO L93 Difference]: Finished difference Result 259 states and 311 transitions. [2022-11-19 06:44:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:44:38,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 71 [2022-11-19 06:44:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:38,600 INFO L225 Difference]: With dead ends: 259 [2022-11-19 06:44:38,600 INFO L226 Difference]: Without dead ends: 200 [2022-11-19 06:44:38,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:44:38,602 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 11 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:38,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 222 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 06:44:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-19 06:44:38,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2022-11-19 06:44:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 119 states have (on average 1.1092436974789917) internal successors, (132), 122 states have internal predecessors, (132), 50 states have call successors, (50), 23 states have call predecessors, (50), 28 states have return successors, (54), 52 states have call predecessors, (54), 49 states have call successors, (54) [2022-11-19 06:44:38,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 236 transitions. [2022-11-19 06:44:38,629 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 236 transitions. Word has length 71 [2022-11-19 06:44:38,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:38,629 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 236 transitions. [2022-11-19 06:44:38,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 06:44:38,630 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 236 transitions. [2022-11-19 06:44:38,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 06:44:38,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:38,631 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:38,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 06:44:38,631 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:38,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:38,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1772650051, now seen corresponding path program 1 times [2022-11-19 06:44:38,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:38,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462353069] [2022-11-19 06:44:38,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:38,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 06:44:38,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:38,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462353069] [2022-11-19 06:44:38,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462353069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:38,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:38,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:44:38,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891836779] [2022-11-19 06:44:38,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:38,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:44:38,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:38,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:44:38,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:38,976 INFO L87 Difference]: Start difference. First operand 198 states and 236 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 06:44:39,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:39,460 INFO L93 Difference]: Finished difference Result 249 states and 298 transitions. [2022-11-19 06:44:39,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:44:39,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 70 [2022-11-19 06:44:39,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:39,462 INFO L225 Difference]: With dead ends: 249 [2022-11-19 06:44:39,463 INFO L226 Difference]: Without dead ends: 207 [2022-11-19 06:44:39,463 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 [2022-11-19 06:44:39,464 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 4 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:39,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 630 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 06:44:39,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-19 06:44:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 200. [2022-11-19 06:44:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 121 states have (on average 1.0991735537190082) internal successors, (133), 124 states have internal predecessors, (133), 50 states have call successors, (50), 23 states have call predecessors, (50), 28 states have return successors, (54), 52 states have call predecessors, (54), 49 states have call successors, (54) [2022-11-19 06:44:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 237 transitions. [2022-11-19 06:44:39,508 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 237 transitions. Word has length 70 [2022-11-19 06:44:39,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:39,509 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 237 transitions. [2022-11-19 06:44:39,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 06:44:39,509 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 237 transitions. [2022-11-19 06:44:39,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 06:44:39,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:39,511 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:39,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 06:44:39,511 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:39,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:39,512 INFO L85 PathProgramCache]: Analyzing trace with hash -162484669, now seen corresponding path program 1 times [2022-11-19 06:44:39,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:39,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660226842] [2022-11-19 06:44:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:39,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 06:44:47,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:47,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660226842] [2022-11-19 06:44:47,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660226842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:47,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820520406] [2022-11-19 06:44:47,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:47,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:47,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:47,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:47,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3493b899-9dab-4069-a27c-6f87916015d9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:44:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:48,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2596 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-19 06:44:48,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:48,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:44:57,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:57,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 78 treesize of output 62 [2022-11-19 06:44:57,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:57,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-19 06:44:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:44:57,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:45:00,686 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-11-19 06:54:16,054 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.