./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:54:26,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:54:26,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:54:26,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:54:26,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:54:26,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:54:26,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:54:26,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:54:26,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:54:26,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:54:26,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:54:26,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:54:26,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:54:26,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:54:26,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:54:26,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:54:26,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:54:26,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:54:26,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:54:26,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:54:26,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:54:26,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:54:26,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:54:26,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:54:26,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:54:26,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:54:26,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:54:26,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:54:26,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:54:26,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:54:26,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:54:26,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:54:26,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:54:26,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:54:26,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:54:26,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:54:26,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:54:26,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:54:26,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:54:26,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:54:26,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:54:26,477 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-19 04:54:26,534 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:54:26,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:54:26,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:54:26,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:54:26,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:54:26,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:54:26,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:54:26,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:54:26,547 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:54:26,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:54:26,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:54:26,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:54:26,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:54:26,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:54:26,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:54:26,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:54:26,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:54:26,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:54:26,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:54:26,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:54:26,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:54:26,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:54:26,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:54:26,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:54:26,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:54:26,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:54:26,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:54:26,554 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:54:26,554 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:54:26,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:54:26,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:54:26,557 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_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 [2021-11-19 04:54:26,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:54:26,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:54:26,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:54:26,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:54:26,922 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:54:26,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-11-19 04:54:27,013 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/data/5705fc03a/d5b436cc2ffd4398b7bbc92662cd0c5f/FLAG1596aff62 [2021-11-19 04:54:28,001 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:54:28,003 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-11-19 04:54:28,052 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/data/5705fc03a/d5b436cc2ffd4398b7bbc92662cd0c5f/FLAG1596aff62 [2021-11-19 04:54:28,410 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/data/5705fc03a/d5b436cc2ffd4398b7bbc92662cd0c5f [2021-11-19 04:54:28,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:54:28,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:54:28,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:54:28,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:54:28,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:54:28,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:54:28" (1/1) ... [2021-11-19 04:54:28,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d58b666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:28, skipping insertion in model container [2021-11-19 04:54:28,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:54:28" (1/1) ... [2021-11-19 04:54:28,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:54:28,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:54:28,947 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2021-11-19 04:54:28,956 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2021-11-19 04:54:28,989 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 04:54:28,997 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 04:54:29,954 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:29,955 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:29,956 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:29,957 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:29,959 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:29,977 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:29,978 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:29,981 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:29,982 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:29,985 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:29,986 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:29,988 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:29,988 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:30,533 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 04:54:30,544 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 04:54:30,546 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 04:54:30,547 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 04:54:30,549 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 04:54:30,550 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 04:54:30,551 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 04:54:30,552 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 04:54:30,553 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 04:54:30,554 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 04:54:30,827 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 04:54:30,889 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:54:30,910 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:54:30,949 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2021-11-19 04:54:30,950 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2021-11-19 04:54:30,952 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 04:54:30,954 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 04:54:31,075 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:31,076 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:31,077 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:31,078 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:31,079 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:31,097 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:31,098 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:31,099 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:31,100 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:31,102 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:31,103 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:31,103 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:31,104 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:54:31,155 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 04:54:31,156 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 04:54:31,157 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 04:54:31,158 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 04:54:31,160 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 04:54:31,161 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 04:54:31,162 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 04:54:31,163 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 04:54:31,163 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 04:54:31,164 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 04:54:31,194 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 04:54:31,216 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:54:31,608 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:54:31,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:31 WrapperNode [2021-11-19 04:54:31,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:54:31,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:54:31,611 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:54:31,611 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:54:31,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:31" (1/1) ... [2021-11-19 04:54:31,767 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:31" (1/1) ... [2021-11-19 04:54:31,838 INFO L137 Inliner]: procedures = 681, calls = 1050, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 149 [2021-11-19 04:54:31,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:54:31,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:54:31,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:54:31,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:54:31,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:31" (1/1) ... [2021-11-19 04:54:31,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:31" (1/1) ... [2021-11-19 04:54:31,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:31" (1/1) ... [2021-11-19 04:54:31,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:31" (1/1) ... [2021-11-19 04:54:31,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:31" (1/1) ... [2021-11-19 04:54:31,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:31" (1/1) ... [2021-11-19 04:54:31,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:31" (1/1) ... [2021-11-19 04:54:31,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:54:31,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:54:31,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:54:31,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:54:31,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:31" (1/1) ... [2021-11-19 04:54:31,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:54:31,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:31,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:54:32,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:54:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:54:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 04:54:32,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 04:54:32,046 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-19 04:54:32,046 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-19 04:54:32,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:54:32,046 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-19 04:54:32,047 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-19 04:54:32,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:54:32,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 04:54:32,047 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_insert_before [2021-11-19 04:54:32,047 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_insert_before [2021-11-19 04:54:32,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:54:32,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:54:32,048 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 04:54:32,048 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 04:54:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:54:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 04:54:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 04:54:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-19 04:54:32,049 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-19 04:54:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-19 04:54:32,050 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-19 04:54:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:54:32,298 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:54:32,316 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:54:32,889 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:54:32,908 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:54:32,911 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 04:54:32,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:54:32 BoogieIcfgContainer [2021-11-19 04:54:32,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:54:32,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:54:32,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:54:32,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:54:32,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:54:28" (1/3) ... [2021-11-19 04:54:32,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec85c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:54:32, skipping insertion in model container [2021-11-19 04:54:32,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:31" (2/3) ... [2021-11-19 04:54:32,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec85c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:54:32, skipping insertion in model container [2021-11-19 04:54:32,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:54:32" (3/3) ... [2021-11-19 04:54:32,927 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_push_back_harness.i [2021-11-19 04:54:32,935 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:54:32,935 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:54:33,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:54:33,054 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:54:33,070 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:54:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 66 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-19 04:54:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 04:54:33,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:33,124 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:33,124 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:33,133 INFO L85 PathProgramCache]: Analyzing trace with hash 524704703, now seen corresponding path program 1 times [2021-11-19 04:54:33,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:33,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909499465] [2021-11-19 04:54:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:33,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:54:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:54:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:54:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:54:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:54:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-19 04:54:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:54:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 04:54:33,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:33,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909499465] [2021-11-19 04:54:33,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909499465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:33,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:33,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:54:33,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105949146] [2021-11-19 04:54:33,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:33,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:54:33,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:33,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:54:33,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:54:33,982 INFO L87 Difference]: Start difference. First operand has 102 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 66 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 04:54:34,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:34,150 INFO L93 Difference]: Finished difference Result 208 states and 310 transitions. [2021-11-19 04:54:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:54:34,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2021-11-19 04:54:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:34,174 INFO L225 Difference]: With dead ends: 208 [2021-11-19 04:54:34,176 INFO L226 Difference]: Without dead ends: 109 [2021-11-19 04:54:34,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:54:34,196 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 21 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:34,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 398 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:54:34,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-19 04:54:34,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-11-19 04:54:34,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-19 04:54:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2021-11-19 04:54:34,303 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 73 [2021-11-19 04:54:34,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:34,305 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2021-11-19 04:54:34,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 04:54:34,306 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2021-11-19 04:54:34,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 04:54:34,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:34,316 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:34,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:54:34,317 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:34,327 INFO L85 PathProgramCache]: Analyzing trace with hash -125862913, now seen corresponding path program 1 times [2021-11-19 04:54:34,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:34,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139860249] [2021-11-19 04:54:34,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:34,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:54:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:54:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:54:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:54:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:54:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-19 04:54:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:54:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 04:54:34,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:34,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139860249] [2021-11-19 04:54:34,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139860249] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:34,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:34,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:54:34,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250815300] [2021-11-19 04:54:34,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:34,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:54:34,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:34,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:54:34,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:54:34,661 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 04:54:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:34,712 INFO L93 Difference]: Finished difference Result 192 states and 265 transitions. [2021-11-19 04:54:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:54:34,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2021-11-19 04:54:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:34,716 INFO L225 Difference]: With dead ends: 192 [2021-11-19 04:54:34,716 INFO L226 Difference]: Without dead ends: 107 [2021-11-19 04:54:34,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:54:34,720 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 12 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:34,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 380 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:54:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-19 04:54:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2021-11-19 04:54:34,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 66 states have internal predecessors, (80), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-19 04:54:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2021-11-19 04:54:34,740 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 73 [2021-11-19 04:54:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:34,742 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2021-11-19 04:54:34,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 04:54:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2021-11-19 04:54:34,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 04:54:34,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:34,745 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:34,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:54:34,746 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:34,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:34,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2140518273, now seen corresponding path program 1 times [2021-11-19 04:54:34,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:34,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710348292] [2021-11-19 04:54:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:34,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:54:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:54:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:54:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:54:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:54:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-19 04:54:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:54:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 04:54:35,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:35,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710348292] [2021-11-19 04:54:35,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710348292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:35,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:35,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:54:35,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381280907] [2021-11-19 04:54:35,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:35,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:54:35,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:35,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:54:35,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:54:35,055 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:54:35,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:35,174 INFO L93 Difference]: Finished difference Result 192 states and 263 transitions. [2021-11-19 04:54:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:54:35,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2021-11-19 04:54:35,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:35,178 INFO L225 Difference]: With dead ends: 192 [2021-11-19 04:54:35,178 INFO L226 Difference]: Without dead ends: 105 [2021-11-19 04:54:35,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:54:35,181 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 22 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:35,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 571 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:54:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-19 04:54:35,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-11-19 04:54:35,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 69 states have internal predecessors, (83), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-19 04:54:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2021-11-19 04:54:35,202 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 73 [2021-11-19 04:54:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:35,203 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 138 transitions. [2021-11-19 04:54:35,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:54:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 138 transitions. [2021-11-19 04:54:35,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 04:54:35,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:35,206 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:35,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:54:35,206 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:35,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:35,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2124999555, now seen corresponding path program 1 times [2021-11-19 04:54:35,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:35,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737844045] [2021-11-19 04:54:35,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:35,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:54:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:54:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:54:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:54:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:54:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-19 04:54:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:54:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 04:54:35,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:35,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737844045] [2021-11-19 04:54:35,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737844045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:35,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:35,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:54:35,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969767029] [2021-11-19 04:54:35,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:35,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:54:35,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:35,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:54:35,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:54:35,555 INFO L87 Difference]: Start difference. First operand 104 states and 138 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:54:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:35,674 INFO L93 Difference]: Finished difference Result 201 states and 268 transitions. [2021-11-19 04:54:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:54:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2021-11-19 04:54:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:35,679 INFO L225 Difference]: With dead ends: 201 [2021-11-19 04:54:35,680 INFO L226 Difference]: Without dead ends: 102 [2021-11-19 04:54:35,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:54:35,686 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 28 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:35,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 570 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:54:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-19 04:54:35,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-19 04:54:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-19 04:54:35,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2021-11-19 04:54:35,725 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 73 [2021-11-19 04:54:35,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:35,726 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2021-11-19 04:54:35,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:54:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2021-11-19 04:54:35,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 04:54:35,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:35,734 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:35,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:54:35,734 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:35,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:35,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1956548997, now seen corresponding path program 1 times [2021-11-19 04:54:35,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:35,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921549902] [2021-11-19 04:54:35,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:35,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:54:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:54:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:36,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:54:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:36,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:54:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:36,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:54:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:36,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-19 04:54:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:36,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:54:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 04:54:36,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:36,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921549902] [2021-11-19 04:54:36,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921549902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:36,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285733894] [2021-11-19 04:54:36,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:36,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:36,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:36,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:36,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:54:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:36,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 04:54:36,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:54:36,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:54:36,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285733894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:36,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:54:36,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 11 [2021-11-19 04:54:36,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377792370] [2021-11-19 04:54:36,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:36,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:54:36,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:36,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:54:36,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:54:36,824 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-19 04:54:37,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:37,176 INFO L93 Difference]: Finished difference Result 194 states and 259 transitions. [2021-11-19 04:54:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:54:37,177 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2021-11-19 04:54:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:37,180 INFO L225 Difference]: With dead ends: 194 [2021-11-19 04:54:37,180 INFO L226 Difference]: Without dead ends: 106 [2021-11-19 04:54:37,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:54:37,183 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 130 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:37,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 713 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:54:37,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-19 04:54:37,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-11-19 04:54:37,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.208955223880597) internal successors, (81), 69 states have internal predecessors, (81), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-19 04:54:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2021-11-19 04:54:37,200 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 73 [2021-11-19 04:54:37,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:37,200 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 138 transitions. [2021-11-19 04:54:37,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-19 04:54:37,201 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 138 transitions. [2021-11-19 04:54:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 04:54:37,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:37,209 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:37,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:37,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:37,423 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:37,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:37,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1237560575, now seen corresponding path program 1 times [2021-11-19 04:54:37,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:37,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223068743] [2021-11-19 04:54:37,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:37,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:54:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-19 04:54:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-19 04:54:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 04:54:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 04:54:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:54:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-19 04:54:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 04:54:37,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:37,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223068743] [2021-11-19 04:54:37,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223068743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:37,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:37,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:54:37,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015995693] [2021-11-19 04:54:37,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:37,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:54:37,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:37,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:54:37,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:54:37,787 INFO L87 Difference]: Start difference. First operand 104 states and 138 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:54:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:37,913 INFO L93 Difference]: Finished difference Result 194 states and 262 transitions. [2021-11-19 04:54:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:54:37,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 75 [2021-11-19 04:54:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:37,916 INFO L225 Difference]: With dead ends: 194 [2021-11-19 04:54:37,916 INFO L226 Difference]: Without dead ends: 104 [2021-11-19 04:54:37,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:54:37,919 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 65 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:37,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 527 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:54:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-19 04:54:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-19 04:54:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-19 04:54:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 137 transitions. [2021-11-19 04:54:37,945 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 137 transitions. Word has length 75 [2021-11-19 04:54:37,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:37,946 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 137 transitions. [2021-11-19 04:54:37,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:54:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 137 transitions. [2021-11-19 04:54:37,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-19 04:54:37,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:37,948 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:37,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:54:37,949 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:37,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1187141198, now seen corresponding path program 1 times [2021-11-19 04:54:37,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:37,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171849688] [2021-11-19 04:54:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:37,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:54:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:54:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:54:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:54:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-19 04:54:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 04:54:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:54:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 04:54:38,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:38,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171849688] [2021-11-19 04:54:38,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171849688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:38,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:38,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:54:38,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389197020] [2021-11-19 04:54:38,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:38,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:54:38,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:38,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:54:38,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:54:38,183 INFO L87 Difference]: Start difference. First operand 104 states and 137 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:54:38,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:38,273 INFO L93 Difference]: Finished difference Result 199 states and 268 transitions. [2021-11-19 04:54:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:54:38,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2021-11-19 04:54:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:38,276 INFO L225 Difference]: With dead ends: 199 [2021-11-19 04:54:38,276 INFO L226 Difference]: Without dead ends: 109 [2021-11-19 04:54:38,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:54:38,280 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 26 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:38,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 441 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:54:38,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-19 04:54:38,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-11-19 04:54:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-19 04:54:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2021-11-19 04:54:38,305 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 77 [2021-11-19 04:54:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:38,306 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2021-11-19 04:54:38,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:54:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2021-11-19 04:54:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 04:54:38,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:38,308 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:38,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:54:38,308 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:38,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1548809988, now seen corresponding path program 1 times [2021-11-19 04:54:38,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:38,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805131528] [2021-11-19 04:54:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:38,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:54:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 04:54:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 04:54:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:54:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-19 04:54:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:54:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 04:54:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 04:54:38,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:38,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805131528] [2021-11-19 04:54:38,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805131528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:38,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:38,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:54:38,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663807974] [2021-11-19 04:54:38,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:38,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:54:38,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:38,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:54:38,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:54:38,598 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:54:38,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:38,689 INFO L93 Difference]: Finished difference Result 202 states and 273 transitions. [2021-11-19 04:54:38,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:54:38,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 78 [2021-11-19 04:54:38,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:38,694 INFO L225 Difference]: With dead ends: 202 [2021-11-19 04:54:38,694 INFO L226 Difference]: Without dead ends: 111 [2021-11-19 04:54:38,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:54:38,696 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 23 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:38,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 449 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:54:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-19 04:54:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2021-11-19 04:54:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-19 04:54:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2021-11-19 04:54:38,712 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 78 [2021-11-19 04:54:38,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:38,713 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2021-11-19 04:54:38,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:54:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2021-11-19 04:54:38,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 04:54:38,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:38,715 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:38,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:54:38,716 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:38,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:38,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1185344546, now seen corresponding path program 1 times [2021-11-19 04:54:38,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:38,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723273468] [2021-11-19 04:54:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:38,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:54:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:54:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:54:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:54:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-19 04:54:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-19 04:54:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:38,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-19 04:54:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-19 04:54:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 04:54:39,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:39,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723273468] [2021-11-19 04:54:39,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723273468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:39,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189118806] [2021-11-19 04:54:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:39,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:39,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:39,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:39,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:54:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 04:54:39,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:54:39,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:54:39,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189118806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:39,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:54:39,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 12 [2021-11-19 04:54:39,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392812301] [2021-11-19 04:54:39,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:39,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:54:39,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:39,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:54:39,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:54:39,540 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-19 04:54:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:39,940 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2021-11-19 04:54:39,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:54:39,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 86 [2021-11-19 04:54:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:39,943 INFO L225 Difference]: With dead ends: 203 [2021-11-19 04:54:39,943 INFO L226 Difference]: Without dead ends: 111 [2021-11-19 04:54:39,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:54:39,946 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 132 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:39,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 709 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:54:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-19 04:54:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-11-19 04:54:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-19 04:54:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2021-11-19 04:54:39,960 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 86 [2021-11-19 04:54:39,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:39,960 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2021-11-19 04:54:39,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-19 04:54:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2021-11-19 04:54:39,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 04:54:39,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:39,963 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:40,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:40,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:40,179 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:40,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:40,179 INFO L85 PathProgramCache]: Analyzing trace with hash 172862485, now seen corresponding path program 1 times [2021-11-19 04:54:40,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:40,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604336330] [2021-11-19 04:54:40,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:40,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:40,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:40,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:40,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:54:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:40,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:54:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:40,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 04:54:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:40,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:54:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:40,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-19 04:54:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:40,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-19 04:54:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:40,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-19 04:54:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:40,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-19 04:54:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 04:54:40,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:40,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604336330] [2021-11-19 04:54:40,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604336330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:40,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601492308] [2021-11-19 04:54:40,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:40,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:40,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:40,483 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:40,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:54:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:40,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 04:54:40,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 04:54:41,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:54:41,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601492308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:41,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:54:41,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2021-11-19 04:54:41,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229425189] [2021-11-19 04:54:41,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:41,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:54:41,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:41,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:54:41,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:54:41,099 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand has 11 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-19 04:54:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:41,586 INFO L93 Difference]: Finished difference Result 208 states and 274 transitions. [2021-11-19 04:54:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:54:41,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 88 [2021-11-19 04:54:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:41,589 INFO L225 Difference]: With dead ends: 208 [2021-11-19 04:54:41,589 INFO L226 Difference]: Without dead ends: 115 [2021-11-19 04:54:41,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:54:41,592 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 136 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:41,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 889 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:54:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-19 04:54:41,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2021-11-19 04:54:41,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-11-19 04:54:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 141 transitions. [2021-11-19 04:54:41,612 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 141 transitions. Word has length 88 [2021-11-19 04:54:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:41,613 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 141 transitions. [2021-11-19 04:54:41,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-19 04:54:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 141 transitions. [2021-11-19 04:54:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 04:54:41,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:41,615 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:41,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:41,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 04:54:41,839 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash 759251201, now seen corresponding path program 1 times [2021-11-19 04:54:41,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:41,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880030595] [2021-11-19 04:54:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:41,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:42,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:42,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:42,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:54:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:42,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:54:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:42,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:54:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:42,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:54:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:42,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:54:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:42,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:54:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:42,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:54:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:42,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 04:54:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 04:54:42,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:42,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880030595] [2021-11-19 04:54:42,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880030595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:42,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:42,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-19 04:54:42,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906122254] [2021-11-19 04:54:42,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:42,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 04:54:42,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:42,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 04:54:42,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:54:42,693 INFO L87 Difference]: Start difference. First operand 108 states and 141 transitions. Second operand has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-19 04:54:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:43,972 INFO L93 Difference]: Finished difference Result 164 states and 230 transitions. [2021-11-19 04:54:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:54:43,973 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 89 [2021-11-19 04:54:43,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:43,977 INFO L225 Difference]: With dead ends: 164 [2021-11-19 04:54:43,978 INFO L226 Difference]: Without dead ends: 162 [2021-11-19 04:54:43,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:54:43,979 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 56 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:43,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1384 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:54:43,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-19 04:54:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 143. [2021-11-19 04:54:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 92 states have internal predecessors, (102), 43 states have call successors, (43), 9 states have call predecessors, (43), 11 states have return successors, (51), 41 states have call predecessors, (51), 42 states have call successors, (51) [2021-11-19 04:54:44,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 196 transitions. [2021-11-19 04:54:44,007 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 196 transitions. Word has length 89 [2021-11-19 04:54:44,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:44,009 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 196 transitions. [2021-11-19 04:54:44,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-19 04:54:44,010 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 196 transitions. [2021-11-19 04:54:44,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 04:54:44,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:44,012 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:44,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 04:54:44,012 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:44,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:44,013 INFO L85 PathProgramCache]: Analyzing trace with hash -50095425, now seen corresponding path program 1 times [2021-11-19 04:54:44,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:44,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442898737] [2021-11-19 04:54:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:44,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:44,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:44,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:44,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:54:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:44,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:54:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:44,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:54:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:44,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:54:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:44,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:54:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:44,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:54:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:44,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:54:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:44,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 04:54:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 04:54:44,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:44,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442898737] [2021-11-19 04:54:44,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442898737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:44,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:44,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:54:44,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267098512] [2021-11-19 04:54:44,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:44,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:54:44,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:44,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:54:44,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:54:44,531 INFO L87 Difference]: Start difference. First operand 143 states and 196 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-19 04:54:44,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:44,988 INFO L93 Difference]: Finished difference Result 243 states and 336 transitions. [2021-11-19 04:54:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:54:44,988 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 89 [2021-11-19 04:54:44,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:44,990 INFO L225 Difference]: With dead ends: 243 [2021-11-19 04:54:44,990 INFO L226 Difference]: Without dead ends: 149 [2021-11-19 04:54:44,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:54:44,992 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 54 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:44,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 872 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:54:44,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-19 04:54:45,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-11-19 04:54:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 92 states have (on average 1.1630434782608696) internal successors, (107), 97 states have internal predecessors, (107), 43 states have call successors, (43), 9 states have call predecessors, (43), 12 states have return successors, (56), 41 states have call predecessors, (56), 42 states have call successors, (56) [2021-11-19 04:54:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 206 transitions. [2021-11-19 04:54:45,013 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 206 transitions. Word has length 89 [2021-11-19 04:54:45,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:45,014 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 206 transitions. [2021-11-19 04:54:45,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-19 04:54:45,014 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 206 transitions. [2021-11-19 04:54:45,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 04:54:45,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:45,017 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:45,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 04:54:45,017 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:45,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:45,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1974343619, now seen corresponding path program 1 times [2021-11-19 04:54:45,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:45,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700948966] [2021-11-19 04:54:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:45,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:45,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:45,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:45,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 04:54:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:45,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:54:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:45,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:54:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:45,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 04:54:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:45,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 04:54:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:45,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-19 04:54:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:45,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-19 04:54:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:45,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-19 04:54:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 04:54:45,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:45,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700948966] [2021-11-19 04:54:45,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700948966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:45,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294900741] [2021-11-19 04:54:45,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:45,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:45,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:45,651 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:45,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:54:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:45,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-19 04:54:45,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:46,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:46,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 17 [2021-11-19 04:54:46,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:46,295 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-19 04:54:46,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 44 [2021-11-19 04:54:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 04:54:50,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:53,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5966 treesize of output 5902 [2021-11-19 04:54:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 04:54:54,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294900741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:54,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:54,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 33 [2021-11-19 04:54:54,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455008592] [2021-11-19 04:54:54,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:54,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 04:54:54,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:54,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 04:54:54,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=959, Unknown=1, NotChecked=0, Total=1056 [2021-11-19 04:54:54,946 INFO L87 Difference]: Start difference. First operand 148 states and 206 transitions. Second operand has 33 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 33 states have internal predecessors, (116), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-19 04:54:58,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:58,548 INFO L93 Difference]: Finished difference Result 332 states and 469 transitions. [2021-11-19 04:54:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:54:58,549 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 33 states have internal predecessors, (116), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) Word has length 91 [2021-11-19 04:54:58,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:58,551 INFO L225 Difference]: With dead ends: 332 [2021-11-19 04:54:58,552 INFO L226 Difference]: Without dead ends: 216 [2021-11-19 04:54:58,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=172, Invalid=1718, Unknown=2, NotChecked=0, Total=1892 [2021-11-19 04:54:58,555 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 89 mSDsluCounter, 2972 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 3130 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:58,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 3130 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 668 Invalid, 0 Unknown, 254 Unchecked, 0.9s Time] [2021-11-19 04:54:58,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-19 04:54:58,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 184. [2021-11-19 04:54:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 129 states have internal predecessors, (145), 46 states have call successors, (46), 11 states have call predecessors, (46), 14 states have return successors, (63), 43 states have call predecessors, (63), 45 states have call successors, (63) [2021-11-19 04:54:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 254 transitions. [2021-11-19 04:54:58,582 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 254 transitions. Word has length 91 [2021-11-19 04:54:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:58,582 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 254 transitions. [2021-11-19 04:54:58,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 33 states have internal predecessors, (116), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-19 04:54:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 254 transitions. [2021-11-19 04:54:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 04:54:58,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:58,585 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:58,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:58,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:58,799 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:58,799 INFO L85 PathProgramCache]: Analyzing trace with hash -443122435, now seen corresponding path program 1 times [2021-11-19 04:54:58,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:58,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18825045] [2021-11-19 04:54:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:58,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:58,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:58,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:58,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:54:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:59,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:54:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:59,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:54:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:59,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:54:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:59,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:54:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:59,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:54:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:59,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:54:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:59,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 04:54:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 04:54:59,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:59,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18825045] [2021-11-19 04:54:59,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18825045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:59,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:59,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:54:59,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641574404] [2021-11-19 04:54:59,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:59,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:54:59,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:59,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:54:59,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:54:59,148 INFO L87 Difference]: Start difference. First operand 184 states and 254 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-19 04:54:59,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:59,390 INFO L93 Difference]: Finished difference Result 312 states and 435 transitions. [2021-11-19 04:54:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:54:59,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 89 [2021-11-19 04:54:59,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:59,394 INFO L225 Difference]: With dead ends: 312 [2021-11-19 04:54:59,394 INFO L226 Difference]: Without dead ends: 186 [2021-11-19 04:54:59,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:54:59,396 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 37 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:59,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 775 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:54:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-19 04:54:59,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2021-11-19 04:54:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 129 states have internal predecessors, (145), 45 states have call successors, (45), 11 states have call predecessors, (45), 14 states have return successors, (58), 42 states have call predecessors, (58), 44 states have call successors, (58) [2021-11-19 04:54:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 248 transitions. [2021-11-19 04:54:59,431 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 248 transitions. Word has length 89 [2021-11-19 04:54:59,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:59,432 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 248 transitions. [2021-11-19 04:54:59,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-19 04:54:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 248 transitions. [2021-11-19 04:54:59,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 04:54:59,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:59,435 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:59,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 04:54:59,436 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:59,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1447052805, now seen corresponding path program 2 times [2021-11-19 04:54:59,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:59,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043707330] [2021-11-19 04:54:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:59,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:59,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:59,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:54:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:59,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:54:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:00,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:55:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:00,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:55:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:00,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-19 04:55:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:00,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:55:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:00,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-19 04:55:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:00,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-19 04:55:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:00,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-19 04:55:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 04:55:00,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:55:00,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043707330] [2021-11-19 04:55:00,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043707330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:55:00,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762294402] [2021-11-19 04:55:00,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:55:00,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:55:00,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:55:00,139 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:55:00,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:55:00,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:55:00,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:55:00,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-19 04:55:00,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:55:00,623 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-19 04:55:00,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 53 [2021-11-19 04:55:00,642 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-19 04:55:00,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 43 [2021-11-19 04:55:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:55:02,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:55:05,877 INFO L354 Elim1Store]: treesize reduction 321, result has 34.5 percent of original size [2021-11-19 04:55:05,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 2504 treesize of output 2360 [2021-11-19 04:55:05,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9291 treesize of output 8915 [2021-11-19 04:55:06,995 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-19 04:55:06,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 6850 treesize of output 6834 [2021-11-19 04:55:31,053 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-19 04:55:31,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:55:31,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-19 04:55:31,247 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-19 04:55:31,306 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-19 04:55:31,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:55:31,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-19 04:55:31,417 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-19 04:55:31,616 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-19 04:55:31,666 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-19 04:55:32,446 INFO L354 Elim1Store]: treesize reduction 22, result has 63.9 percent of original size [2021-11-19 04:55:32,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 155 [2021-11-19 04:55:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 04:55:33,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762294402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:55:33,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:55:33,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 18] total 42 [2021-11-19 04:55:33,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954229736] [2021-11-19 04:55:33,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:55:33,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-19 04:55:33,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:33,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-19 04:55:33,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1582, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 04:55:33,909 INFO L87 Difference]: Start difference. First operand 183 states and 248 transitions. Second operand has 42 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 37 states have internal predecessors, (130), 10 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-19 04:55:38,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:55:38,534 INFO L93 Difference]: Finished difference Result 376 states and 520 transitions. [2021-11-19 04:55:38,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 04:55:38,535 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 37 states have internal predecessors, (130), 10 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) Word has length 93 [2021-11-19 04:55:38,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:55:38,538 INFO L225 Difference]: With dead ends: 376 [2021-11-19 04:55:38,538 INFO L226 Difference]: Without dead ends: 248 [2021-11-19 04:55:38,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=324, Invalid=3336, Unknown=0, NotChecked=0, Total=3660 [2021-11-19 04:55:38,543 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 218 mSDsluCounter, 3281 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:55:38,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 3444 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1610 Invalid, 0 Unknown, 333 Unchecked, 2.6s Time] [2021-11-19 04:55:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-19 04:55:38,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 178. [2021-11-19 04:55:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 119 states have (on average 1.1512605042016806) internal successors, (137), 124 states have internal predecessors, (137), 44 states have call successors, (44), 11 states have call predecessors, (44), 14 states have return successors, (53), 42 states have call predecessors, (53), 43 states have call successors, (53) [2021-11-19 04:55:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 234 transitions. [2021-11-19 04:55:38,574 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 234 transitions. Word has length 93 [2021-11-19 04:55:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:55:38,575 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 234 transitions. [2021-11-19 04:55:38,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 37 states have internal predecessors, (130), 10 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-19 04:55:38,576 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 234 transitions. [2021-11-19 04:55:38,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 04:55:38,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:55:38,579 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:55:38,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:55:38,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:55:38,807 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:55:38,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:55:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash -270009515, now seen corresponding path program 1 times [2021-11-19 04:55:38,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:55:38,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679859367] [2021-11-19 04:55:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:55:38,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:55:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:39,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:55:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:39,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:55:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:39,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:55:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:39,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:55:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:39,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:55:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:39,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:55:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:39,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:55:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:39,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:55:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:39,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:55:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:39,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 04:55:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:39,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-19 04:55:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:39,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-19 04:55:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 04:55:40,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:55:40,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679859367] [2021-11-19 04:55:40,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679859367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:55:40,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:55:40,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-19 04:55:40,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764042543] [2021-11-19 04:55:40,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:55:40,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:55:40,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:40,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:55:40,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:55:40,123 INFO L87 Difference]: Start difference. First operand 178 states and 234 transitions. Second operand has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-19 04:55:41,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:55:41,996 INFO L93 Difference]: Finished difference Result 207 states and 280 transitions. [2021-11-19 04:55:41,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:55:41,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 103 [2021-11-19 04:55:41,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:55:41,999 INFO L225 Difference]: With dead ends: 207 [2021-11-19 04:55:41,999 INFO L226 Difference]: Without dead ends: 205 [2021-11-19 04:55:42,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:55:42,001 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 51 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:55:42,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1513 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 04:55:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-19 04:55:42,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 186. [2021-11-19 04:55:42,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 124 states have (on average 1.1451612903225807) internal successors, (142), 130 states have internal predecessors, (142), 45 states have call successors, (45), 12 states have call predecessors, (45), 16 states have return successors, (57), 43 states have call predecessors, (57), 44 states have call successors, (57) [2021-11-19 04:55:42,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 244 transitions. [2021-11-19 04:55:42,031 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 244 transitions. Word has length 103 [2021-11-19 04:55:42,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:55:42,032 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 244 transitions. [2021-11-19 04:55:42,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-19 04:55:42,032 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 244 transitions. [2021-11-19 04:55:42,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 04:55:42,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:55:42,035 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:55:42,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 04:55:42,036 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:55:42,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:55:42,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1079356141, now seen corresponding path program 1 times [2021-11-19 04:55:42,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:55:42,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258273435] [2021-11-19 04:55:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:55:42,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:55:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:42,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:55:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:42,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:55:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:42,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:55:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:42,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:55:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:42,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:55:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:42,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:55:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:42,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:55:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:42,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:55:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:42,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:55:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:42,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 04:55:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:42,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-19 04:55:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:42,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-19 04:55:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 04:55:42,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:55:42,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258273435] [2021-11-19 04:55:42,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258273435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:55:42,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:55:42,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-19 04:55:42,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460593972] [2021-11-19 04:55:42,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:55:42,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:55:42,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:42,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:55:42,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:55:42,895 INFO L87 Difference]: Start difference. First operand 186 states and 244 transitions. Second operand has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-19 04:55:44,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:55:44,118 INFO L93 Difference]: Finished difference Result 312 states and 415 transitions. [2021-11-19 04:55:44,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:55:44,119 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 103 [2021-11-19 04:55:44,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:55:44,122 INFO L225 Difference]: With dead ends: 312 [2021-11-19 04:55:44,122 INFO L226 Difference]: Without dead ends: 204 [2021-11-19 04:55:44,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-11-19 04:55:44,124 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 65 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:55:44,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1028 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 04:55:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-19 04:55:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 186. [2021-11-19 04:55:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 124 states have (on average 1.1451612903225807) internal successors, (142), 130 states have internal predecessors, (142), 45 states have call successors, (45), 12 states have call predecessors, (45), 16 states have return successors, (55), 43 states have call predecessors, (55), 44 states have call successors, (55) [2021-11-19 04:55:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 242 transitions. [2021-11-19 04:55:44,153 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 242 transitions. Word has length 103 [2021-11-19 04:55:44,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:55:44,154 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 242 transitions. [2021-11-19 04:55:44,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-19 04:55:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 242 transitions. [2021-11-19 04:55:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 04:55:44,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:55:44,157 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:55:44,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 04:55:44,158 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:55:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:55:44,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1472383151, now seen corresponding path program 1 times [2021-11-19 04:55:44,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:55:44,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922853064] [2021-11-19 04:55:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:55:44,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:55:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:44,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:55:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:44,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:55:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:44,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:55:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:44,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:55:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:44,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:55:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:44,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:55:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:44,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:55:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:44,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:55:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:44,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:55:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:44,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 04:55:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:44,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-19 04:55:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:44,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-19 04:55:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 04:55:44,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:55:44,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922853064] [2021-11-19 04:55:44,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922853064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:55:44,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:55:44,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:55:44,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122233963] [2021-11-19 04:55:44,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:55:44,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:55:44,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:44,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:55:44,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:55:44,496 INFO L87 Difference]: Start difference. First operand 186 states and 242 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 04:55:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:55:44,725 INFO L93 Difference]: Finished difference Result 286 states and 369 transitions. [2021-11-19 04:55:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:55:44,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2021-11-19 04:55:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:55:44,728 INFO L225 Difference]: With dead ends: 286 [2021-11-19 04:55:44,729 INFO L226 Difference]: Without dead ends: 177 [2021-11-19 04:55:44,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:55:44,731 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 36 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:55:44,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 785 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:55:44,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-19 04:55:44,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-19 04:55:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 122 states have internal predecessors, (134), 44 states have call successors, (44), 12 states have call predecessors, (44), 14 states have return successors, (48), 42 states have call predecessors, (48), 43 states have call successors, (48) [2021-11-19 04:55:44,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 226 transitions. [2021-11-19 04:55:44,760 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 226 transitions. Word has length 103 [2021-11-19 04:55:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:55:44,760 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 226 transitions. [2021-11-19 04:55:44,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 04:55:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 226 transitions. [2021-11-19 04:55:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 04:55:44,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:55:44,763 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:55:44,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 04:55:44,764 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:55:44,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:55:44,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2046460642, now seen corresponding path program 3 times [2021-11-19 04:55:44,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:55:44,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482147444] [2021-11-19 04:55:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:55:44,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:55:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:55:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:55:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 04:55:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:55:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:55:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:55:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-19 04:55:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-19 04:55:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:55:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:55:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-19 04:55:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:55:45,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:55:45,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482147444] [2021-11-19 04:55:45,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482147444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:55:45,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851725895] [2021-11-19 04:55:45,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:55:45,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:55:45,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:55:45,611 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:55:45,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:55:46,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-19 04:55:46,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:55:46,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-19 04:55:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:55:46,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:55:46,600 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:55:46,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 35 treesize of output 22 [2021-11-19 04:56:00,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:00,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:00,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:00,856 INFO L354 Elim1Store]: treesize reduction 293, result has 15.3 percent of original size [2021-11-19 04:56:00,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 523 treesize of output 342 [2021-11-19 04:56:00,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:00,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:00,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:00,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:00,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:56:01,015 INFO L354 Elim1Store]: treesize reduction 274, result has 16.2 percent of original size [2021-11-19 04:56:01,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 187 treesize of output 114 [2021-11-19 04:56:02,038 INFO L354 Elim1Store]: treesize reduction 296, result has 22.3 percent of original size [2021-11-19 04:56:02,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 397 treesize of output 288 [2021-11-19 04:56:02,224 INFO L354 Elim1Store]: treesize reduction 339, result has 8.1 percent of original size [2021-11-19 04:56:02,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 14 new quantified variables, introduced 36 case distinctions, treesize of input 241 treesize of output 181 [2021-11-19 04:56:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 04:56:02,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:56:02,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1175 treesize of output 1073 [2021-11-19 04:56:03,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3602 treesize of output 3530 [2021-11-19 04:56:08,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851725895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:56:08,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:56:08,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-11-19 04:56:08,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669900680] [2021-11-19 04:56:08,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:56:08,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-19 04:56:08,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:56:08,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-19 04:56:08,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1021, Unknown=2, NotChecked=0, Total=1122 [2021-11-19 04:56:08,587 INFO L87 Difference]: Start difference. First operand 177 states and 226 transitions. Second operand has 28 states, 25 states have (on average 4.32) internal successors, (108), 23 states have internal predecessors, (108), 11 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-19 04:56:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:56:09,723 INFO L93 Difference]: Finished difference Result 232 states and 291 transitions. [2021-11-19 04:56:09,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 04:56:09,724 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 4.32) internal successors, (108), 23 states have internal predecessors, (108), 11 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) Word has length 102 [2021-11-19 04:56:09,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:56:09,728 INFO L225 Difference]: With dead ends: 232 [2021-11-19 04:56:09,728 INFO L226 Difference]: Without dead ends: 227 [2021-11-19 04:56:09,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 109 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=173, Invalid=1717, Unknown=2, NotChecked=0, Total=1892 [2021-11-19 04:56:09,731 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 59 mSDsluCounter, 2534 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 2709 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:56:09,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 2709 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 381 Invalid, 0 Unknown, 313 Unchecked, 0.6s Time] [2021-11-19 04:56:09,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-19 04:56:09,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 206. [2021-11-19 04:56:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 146 states have internal predecessors, (161), 44 states have call successors, (44), 17 states have call predecessors, (44), 19 states have return successors, (47), 42 states have call predecessors, (47), 43 states have call successors, (47) [2021-11-19 04:56:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 252 transitions. [2021-11-19 04:56:09,827 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 252 transitions. Word has length 102 [2021-11-19 04:56:09,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:56:09,828 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 252 transitions. [2021-11-19 04:56:09,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 4.32) internal successors, (108), 23 states have internal predecessors, (108), 11 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-19 04:56:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 252 transitions. [2021-11-19 04:56:09,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 04:56:09,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:56:09,833 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:56:09,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:56:10,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:56:10,046 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:56:10,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:56:10,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1303128156, now seen corresponding path program 1 times [2021-11-19 04:56:10,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:56:10,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027571756] [2021-11-19 04:56:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:10,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:56:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:56:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:56:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:56:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:56:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:56:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:56:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:56:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:56:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:56:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 04:56:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-19 04:56:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-19 04:56:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-19 04:56:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-19 04:56:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 04:56:11,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:56:11,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027571756] [2021-11-19 04:56:11,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027571756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:56:11,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925923441] [2021-11-19 04:56:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:11,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:56:11,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:56:11,080 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:56:11,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:56:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:11,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-19 04:56:11,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:56:11,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:12,746 INFO L354 Elim1Store]: treesize reduction 1373, result has 22.9 percent of original size [2021-11-19 04:56:12,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 4713 treesize of output 2927 [2021-11-19 04:56:12,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:13,745 INFO L354 Elim1Store]: treesize reduction 1048, result has 27.7 percent of original size [2021-11-19 04:56:13,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 10 new quantified variables, introduced 24 case distinctions, treesize of input 11924 treesize of output 5295 [2021-11-19 04:56:14,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:14,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:14,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:14,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:56:14,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 112 treesize of output 114 [2021-11-19 04:56:15,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:15,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:15,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:56:15,289 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-11-19 04:56:15,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 218 treesize of output 201 [2021-11-19 04:56:15,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:15,582 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-11-19 04:56:15,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 10 [2021-11-19 04:56:15,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:15,893 INFO L354 Elim1Store]: treesize reduction 57, result has 19.7 percent of original size [2021-11-19 04:56:15,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 33 treesize of output 27 [2021-11-19 04:56:16,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 04:56:16,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:16,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:16,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-11-19 04:56:17,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:17,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:17,308 INFO L354 Elim1Store]: treesize reduction 28, result has 72.3 percent of original size [2021-11-19 04:56:17,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 266 treesize of output 290 [2021-11-19 04:56:29,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:29,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:29,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:56:29,208 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-11-19 04:56:29,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 43 [2021-11-19 04:56:29,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:29,567 INFO L354 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2021-11-19 04:56:29,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 60 treesize of output 66 [2021-11-19 04:56:29,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:29,732 INFO L354 Elim1Store]: treesize reduction 13, result has 51.9 percent of original size [2021-11-19 04:56:29,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 54 [2021-11-19 04:56:30,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:30,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:30,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:30,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:56:30,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 70 treesize of output 80 [2021-11-19 04:56:33,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:33,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:33,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:56:33,478 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-19 04:56:33,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 13 [2021-11-19 04:56:33,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:33,581 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 04:56:33,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 33 treesize of output 13 [2021-11-19 04:56:33,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:33,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:33,927 INFO L354 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2021-11-19 04:56:33,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 80 [2021-11-19 04:56:34,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:34,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:34,164 INFO L354 Elim1Store]: treesize reduction 43, result has 24.6 percent of original size [2021-11-19 04:56:34,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 37 [2021-11-19 04:56:34,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:34,581 INFO L354 Elim1Store]: treesize reduction 26, result has 61.2 percent of original size [2021-11-19 04:56:34,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 60 treesize of output 80 [2021-11-19 04:56:34,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:34,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:34,803 INFO L354 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2021-11-19 04:56:34,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-19 04:56:34,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:34,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:34,936 INFO L354 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2021-11-19 04:56:34,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 80 [2021-11-19 04:56:35,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:35,202 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-11-19 04:56:35,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 41 [2021-11-19 04:56:35,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:35,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-11-19 04:56:35,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:35,844 INFO L354 Elim1Store]: treesize reduction 14, result has 79.1 percent of original size [2021-11-19 04:56:35,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 67 treesize of output 99 [2021-11-19 04:56:53,982 INFO L354 Elim1Store]: treesize reduction 390, result has 39.5 percent of original size [2021-11-19 04:56:53,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 451 treesize of output 459 [2021-11-19 04:56:54,716 INFO L354 Elim1Store]: treesize reduction 496, result has 33.1 percent of original size [2021-11-19 04:56:54,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 17 new quantified variables, introduced 66 case distinctions, treesize of input 453 treesize of output 548 [2021-11-19 04:58:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:58:52,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:59:07,510 WARN L227 SmtUtils]: Spent 10.19s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:59:17,866 WARN L227 SmtUtils]: Spent 10.17s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:59:20,346 WARN L838 $PredicateComparison]: unable to prove that (or (= (mod |c_aws_linked_list_node_prev_is_valid_#res| 256) 0) (let ((.cse2 (+ |c_aws_linked_list_node_prev_is_valid_#in~node.offset| 8))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_prev_is_valid_#in~node.base|) .cse2)) (.cse1 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_prev_is_valid_#in~node.base|) .cse2))) (and (= |c_aws_linked_list_node_prev_is_valid_#in~node.base| (select (select |c_#memory_$Pointer$.base| .cse0) .cse1)) (= (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1) |c_aws_linked_list_node_prev_is_valid_#in~node.offset|)))) (and (forall ((v_aws_linked_list_insert_before_~to_add.base_BEFORE_CALL_13 Int) (v_aws_linked_list_insert_before_~to_add.offset_BEFORE_CALL_16 Int)) (= v_aws_linked_list_insert_before_~to_add.offset_BEFORE_CALL_16 (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_insert_before_~to_add.base_BEFORE_CALL_13) v_aws_linked_list_insert_before_~to_add.offset_BEFORE_CALL_16)) (+ (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_insert_before_~to_add.base_BEFORE_CALL_13) v_aws_linked_list_insert_before_~to_add.offset_BEFORE_CALL_16) 8)))) (forall ((v_aws_linked_list_insert_before_~to_add.base_BEFORE_CALL_13 Int) (v_aws_linked_list_insert_before_~to_add.offset_BEFORE_CALL_16 Int)) (= v_aws_linked_list_insert_before_~to_add.base_BEFORE_CALL_13 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_insert_before_~to_add.base_BEFORE_CALL_13) v_aws_linked_list_insert_before_~to_add.offset_BEFORE_CALL_16)) (+ (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_insert_before_~to_add.base_BEFORE_CALL_13) v_aws_linked_list_insert_before_~to_add.offset_BEFORE_CALL_16) 8)))))) is different from false [2021-11-19 04:59:21,167 INFO L354 Elim1Store]: treesize reduction 13366, result has 0.0 percent of original size [2021-11-19 04:59:21,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 11 new quantified variables, introduced 40 case distinctions, treesize of input 6097482 treesize of output 1 [2021-11-19 04:59:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 04:59:21,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925923441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:59:21,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:59:21,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 16] total 53 [2021-11-19 04:59:21,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369580922] [2021-11-19 04:59:21,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:59:21,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-19 04:59:21,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:59:21,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-19 04:59:21,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2486, Unknown=3, NotChecked=100, Total=2756 [2021-11-19 04:59:21,423 INFO L87 Difference]: Start difference. First operand 206 states and 252 transitions. Second operand has 53 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 43 states have internal predecessors, (138), 17 states have call successors, (39), 6 states have call predecessors, (39), 13 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) [2021-11-19 04:59:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:59:50,973 INFO L93 Difference]: Finished difference Result 259 states and 309 transitions. [2021-11-19 04:59:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 04:59:50,974 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 43 states have internal predecessors, (138), 17 states have call successors, (39), 6 states have call predecessors, (39), 13 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) Word has length 117 [2021-11-19 04:59:50,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:59:50,977 INFO L225 Difference]: With dead ends: 259 [2021-11-19 04:59:50,977 INFO L226 Difference]: Without dead ends: 256 [2021-11-19 04:59:50,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 226 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=374, Invalid=5632, Unknown=4, NotChecked=152, Total=6162 [2021-11-19 04:59:50,981 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 119 mSDsluCounter, 3271 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:59:50,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 3380 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1172 Invalid, 0 Unknown, 635 Unchecked, 2.1s Time] [2021-11-19 04:59:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-19 04:59:51,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 243. [2021-11-19 04:59:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 170 states have (on average 1.1352941176470588) internal successors, (193), 176 states have internal predecessors, (193), 46 states have call successors, (46), 22 states have call predecessors, (46), 26 states have return successors, (53), 44 states have call predecessors, (53), 45 states have call successors, (53) [2021-11-19 04:59:51,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 292 transitions. [2021-11-19 04:59:51,023 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 292 transitions. Word has length 117 [2021-11-19 04:59:51,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:59:51,027 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 292 transitions. [2021-11-19 04:59:51,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 43 states have internal predecessors, (138), 17 states have call successors, (39), 6 states have call predecessors, (39), 13 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) [2021-11-19 04:59:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 292 transitions. [2021-11-19 04:59:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 04:59:51,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:59:51,030 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:59:51,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:59:51,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:59:51,239 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:59:51,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:59:51,239 INFO L85 PathProgramCache]: Analyzing trace with hash -2112474782, now seen corresponding path program 1 times [2021-11-19 04:59:51,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:59:51,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640065327] [2021-11-19 04:59:51,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:59:51,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:59:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:59:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:59:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:59:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:59:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:59:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:59:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:59:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:59:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:59:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 04:59:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-19 04:59:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-19 04:59:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-19 04:59:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-19 04:59:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:59:51,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:59:51,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640065327] [2021-11-19 04:59:51,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640065327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:59:51,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:59:51,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-19 04:59:51,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871928855] [2021-11-19 04:59:51,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:59:51,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 04:59:51,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:59:51,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 04:59:51,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:59:51,990 INFO L87 Difference]: Start difference. First operand 243 states and 292 transitions. Second operand has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-19 04:59:53,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:59:53,154 INFO L93 Difference]: Finished difference Result 351 states and 430 transitions. [2021-11-19 04:59:53,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:59:53,156 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 117 [2021-11-19 04:59:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:59:53,159 INFO L225 Difference]: With dead ends: 351 [2021-11-19 04:59:53,159 INFO L226 Difference]: Without dead ends: 266 [2021-11-19 04:59:53,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:59:53,161 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 61 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:59:53,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1004 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:59:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-19 04:59:53,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 247. [2021-11-19 04:59:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 174 states have (on average 1.1436781609195403) internal successors, (199), 180 states have internal predecessors, (199), 46 states have call successors, (46), 22 states have call predecessors, (46), 26 states have return successors, (53), 44 states have call predecessors, (53), 45 states have call successors, (53) [2021-11-19 04:59:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 298 transitions. [2021-11-19 04:59:53,192 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 298 transitions. Word has length 117 [2021-11-19 04:59:53,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:59:53,195 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 298 transitions. [2021-11-19 04:59:53,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-19 04:59:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 298 transitions. [2021-11-19 04:59:53,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 04:59:53,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:59:53,197 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:59:53,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 04:59:53,198 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:59:53,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:59:53,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1789465504, now seen corresponding path program 1 times [2021-11-19 04:59:53,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:59:53,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630111795] [2021-11-19 04:59:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:59:53,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:59:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:59:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:59:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:59:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:59:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:59:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:59:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:59:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:59:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:59:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 04:59:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-19 04:59:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-19 04:59:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-19 04:59:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-19 04:59:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:59:53,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:59:53,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630111795] [2021-11-19 04:59:53,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630111795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:59:53,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:59:53,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 04:59:53,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039921764] [2021-11-19 04:59:53,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:59:53,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:59:53,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:59:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:59:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:59:53,833 INFO L87 Difference]: Start difference. First operand 247 states and 298 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 04:59:54,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:59:54,300 INFO L93 Difference]: Finished difference Result 354 states and 432 transitions. [2021-11-19 04:59:54,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:59:54,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 117 [2021-11-19 04:59:54,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:59:54,304 INFO L225 Difference]: With dead ends: 354 [2021-11-19 04:59:54,304 INFO L226 Difference]: Without dead ends: 256 [2021-11-19 04:59:54,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:59:54,306 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 46 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:59:54,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1080 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:59:54,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-19 04:59:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 238. [2021-11-19 04:59:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 168 states have (on average 1.130952380952381) internal successors, (190), 173 states have internal predecessors, (190), 44 states have call successors, (44), 22 states have call predecessors, (44), 25 states have return successors, (47), 42 states have call predecessors, (47), 43 states have call successors, (47) [2021-11-19 04:59:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 281 transitions. [2021-11-19 04:59:54,339 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 281 transitions. Word has length 117 [2021-11-19 04:59:54,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:59:54,339 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 281 transitions. [2021-11-19 04:59:54,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 04:59:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 281 transitions. [2021-11-19 04:59:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 04:59:54,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:59:54,342 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:59:54,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 04:59:54,342 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:59:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:59:54,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1263280266, now seen corresponding path program 1 times [2021-11-19 04:59:54,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:59:54,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386416789] [2021-11-19 04:59:54,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:59:54,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:59:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:55,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:59:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:55,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:59:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:55,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 04:59:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:56,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:59:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:56,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:59:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:56,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:59:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:56,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-19 04:59:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:56,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-19 04:59:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:57,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:59:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:57,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:59:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:57,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-19 04:59:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:57,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-19 04:59:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:57,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-19 04:59:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 04:59:57,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:59:57,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386416789] [2021-11-19 04:59:57,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386416789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:59:57,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135046862] [2021-11-19 04:59:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:59:57,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:59:57,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:59:57,735 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:59:57,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:59:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:59:57,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-19 04:59:57,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:59:58,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:59:58,571 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 04:59:58,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 40 treesize of output 27 [2021-11-19 05:00:39,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:00:39,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:00:39,358 INFO L354 Elim1Store]: treesize reduction 313, result has 15.4 percent of original size [2021-11-19 05:00:39,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 560 treesize of output 367 [2021-11-19 05:00:39,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:00:39,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:00:39,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:00:39,470 INFO L354 Elim1Store]: treesize reduction 303, result has 13.4 percent of original size [2021-11-19 05:00:39,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 104 [2021-11-19 05:00:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 05:00:42,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:00:44,614 INFO L354 Elim1Store]: treesize reduction 3460, result has 0.6 percent of original size [2021-11-19 05:00:44,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 129266 treesize of output 110462 [2021-11-19 05:00:45,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-19 05:00:45,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:00:45,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-19 05:00:45,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966135543] [2021-11-19 05:00:45,751 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 05:00:45,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 05:00:45,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:00:45,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 05:00:45,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3490, Unknown=3, NotChecked=0, Total=3660 [2021-11-19 05:00:45,754 INFO L87 Difference]: Start difference. First operand 238 states and 281 transitions. Second operand has 34 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 11 states have call successors, (15), 3 states have call predecessors, (15), 6 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-19 05:00:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:00:59,850 INFO L93 Difference]: Finished difference Result 348 states and 439 transitions. [2021-11-19 05:00:59,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:00:59,850 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 11 states have call successors, (15), 3 states have call predecessors, (15), 6 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) Word has length 116 [2021-11-19 05:00:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:00:59,854 INFO L225 Difference]: With dead ends: 348 [2021-11-19 05:00:59,855 INFO L226 Difference]: Without dead ends: 346 [2021-11-19 05:00:59,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 127 SyntacticMatches, 13 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 54.0s TimeCoverageRelationStatistics Valid=337, Invalid=7139, Unknown=6, NotChecked=0, Total=7482 [2021-11-19 05:00:59,860 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 163 mSDsluCounter, 2527 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 2629 SdHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:00:59,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 2629 Invalid, 2792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2692 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-19 05:00:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-19 05:00:59,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 274. [2021-11-19 05:00:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 186 states have (on average 1.1236559139784945) internal successors, (209), 192 states have internal predecessors, (209), 59 states have call successors, (59), 24 states have call predecessors, (59), 28 states have return successors, (64), 57 states have call predecessors, (64), 58 states have call successors, (64) [2021-11-19 05:00:59,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 332 transitions. [2021-11-19 05:00:59,931 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 332 transitions. Word has length 116 [2021-11-19 05:00:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:00:59,933 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 332 transitions. [2021-11-19 05:00:59,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 11 states have call successors, (15), 3 states have call predecessors, (15), 6 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-19 05:00:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 332 transitions. [2021-11-19 05:00:59,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 05:00:59,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:00:59,948 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:00:59,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-19 05:01:00,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-19 05:01:00,167 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:00,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2072626892, now seen corresponding path program 1 times [2021-11-19 05:01:00,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:00,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082196883] [2021-11-19 05:01:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:00,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:01:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:01:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 05:01:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:01:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 05:01:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:01:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-19 05:01:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-19 05:01:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 05:01:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 05:01:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-19 05:01:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-19 05:01:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-19 05:01:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-19 05:01:01,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:01,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082196883] [2021-11-19 05:01:01,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082196883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:01:01,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56040037] [2021-11-19 05:01:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:01,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:01,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:01:01,663 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:01:01,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 05:01:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:01,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-19 05:01:01,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:01:01,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:01:02,291 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 05:01:02,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 39 treesize of output 26 [2021-11-19 05:01:29,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:01:29,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:01:29,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:01:29,936 INFO L354 Elim1Store]: treesize reduction 564, result has 16.3 percent of original size [2021-11-19 05:01:29,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 137 [2021-11-19 05:01:29,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:01:29,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 83 [2021-11-19 05:01:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 05:01:43,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:01:44,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3638 treesize of output 3566 [2021-11-19 05:01:48,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56040037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:01:48,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:01:48,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-11-19 05:01:48,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410397073] [2021-11-19 05:01:48,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:01:48,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-19 05:01:48,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:48,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-19 05:01:48,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1433, Unknown=5, NotChecked=0, Total=1560 [2021-11-19 05:01:48,999 INFO L87 Difference]: Start difference. First operand 274 states and 332 transitions. Second operand has 37 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 35 states have internal predecessors, (123), 15 states have call successors, (28), 6 states have call predecessors, (28), 6 states have return successors, (25), 12 states have call predecessors, (25), 14 states have call successors, (25) [2021-11-19 05:01:58,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:58,444 INFO L93 Difference]: Finished difference Result 483 states and 620 transitions. [2021-11-19 05:01:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 05:01:58,445 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 35 states have internal predecessors, (123), 15 states have call successors, (28), 6 states have call predecessors, (28), 6 states have return successors, (25), 12 states have call predecessors, (25), 14 states have call successors, (25) Word has length 116 [2021-11-19 05:01:58,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:58,449 INFO L225 Difference]: With dead ends: 483 [2021-11-19 05:01:58,449 INFO L226 Difference]: Without dead ends: 374 [2021-11-19 05:01:58,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 139 SyntacticMatches, 13 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 52.7s TimeCoverageRelationStatistics Valid=232, Invalid=3182, Unknown=8, NotChecked=0, Total=3422 [2021-11-19 05:01:58,453 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 97 mSDsluCounter, 3496 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 3688 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 672 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:58,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 3688 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 883 Invalid, 0 Unknown, 672 Unchecked, 1.7s Time] [2021-11-19 05:01:58,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-19 05:01:58,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 311. [2021-11-19 05:01:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 210 states have (on average 1.1047619047619048) internal successors, (232), 216 states have internal predecessors, (232), 68 states have call successors, (68), 28 states have call predecessors, (68), 32 states have return successors, (73), 66 states have call predecessors, (73), 67 states have call successors, (73) [2021-11-19 05:01:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 373 transitions. [2021-11-19 05:01:58,507 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 373 transitions. Word has length 116 [2021-11-19 05:01:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:58,508 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 373 transitions. [2021-11-19 05:01:58,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 35 states have internal predecessors, (123), 15 states have call successors, (28), 6 states have call predecessors, (28), 6 states have return successors, (25), 12 states have call predecessors, (25), 14 states have call successors, (25) [2021-11-19 05:01:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 373 transitions. [2021-11-19 05:01:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 05:01:58,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:58,511 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:58,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 05:01:58,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-19 05:01:58,727 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:58,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1360457194, now seen corresponding path program 1 times [2021-11-19 05:01:58,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:58,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963431813] [2021-11-19 05:01:58,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:58,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:58,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:01:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:58,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:01:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:58,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 05:01:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:58,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:01:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:58,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 05:01:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:58,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 05:01:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:58,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 05:01:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:58,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:01:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:58,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:01:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:58,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 05:01:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:58,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-19 05:01:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:59,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-19 05:01:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:59,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-19 05:01:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:59,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-19 05:01:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:59,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-19 05:01:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 05:01:59,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:59,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963431813] [2021-11-19 05:01:59,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963431813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:59,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:59,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 05:01:59,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057637925] [2021-11-19 05:01:59,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:59,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:01:59,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:59,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:01:59,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:01:59,052 INFO L87 Difference]: Start difference. First operand 311 states and 373 transitions. Second operand has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:01:59,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:59,293 INFO L93 Difference]: Finished difference Result 317 states and 378 transitions. [2021-11-19 05:01:59,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:01:59,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 123 [2021-11-19 05:01:59,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:59,297 INFO L225 Difference]: With dead ends: 317 [2021-11-19 05:01:59,297 INFO L226 Difference]: Without dead ends: 315 [2021-11-19 05:01:59,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:01:59,300 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 8 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:59,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 572 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:01:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-19 05:01:59,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-11-19 05:01:59,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 213 states have (on average 1.1032863849765258) internal successors, (235), 219 states have internal predecessors, (235), 68 states have call successors, (68), 29 states have call predecessors, (68), 33 states have return successors, (73), 66 states have call predecessors, (73), 67 states have call successors, (73) [2021-11-19 05:01:59,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 376 transitions. [2021-11-19 05:01:59,355 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 376 transitions. Word has length 123 [2021-11-19 05:01:59,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:59,355 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 376 transitions. [2021-11-19 05:01:59,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:01:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 376 transitions. [2021-11-19 05:01:59,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 05:01:59,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:59,359 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:59,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 05:01:59,359 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:59,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:59,360 INFO L85 PathProgramCache]: Analyzing trace with hash -319363785, now seen corresponding path program 2 times [2021-11-19 05:01:59,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:59,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805078508] [2021-11-19 05:01:59,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:59,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:59,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:01:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:59,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:01:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:59,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 05:01:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:00,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:02:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:00,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 05:02:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:00,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 05:02:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:00,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-19 05:02:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:00,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-19 05:02:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:00,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-19 05:02:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:00,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 05:02:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:00,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-19 05:02:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:00,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-19 05:02:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:00,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-19 05:02:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:00,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-19 05:02:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 05:02:00,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:00,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805078508] [2021-11-19 05:02:00,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805078508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:02:00,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127205336] [2021-11-19 05:02:00,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:02:00,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:00,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:02:00,347 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:02:00,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca90ff14-429d-4d21-8bc9-2538c718edf6/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 05:02:00,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:02:00,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:02:00,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-19 05:02:00,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:02:00,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:02:00,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:02:00,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 17 [2021-11-19 05:02:00,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:02:00,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 17 [2021-11-19 05:02:01,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:02:01,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:02:01,109 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-19 05:02:01,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 89 [2021-11-19 05:02:01,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:02:01,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:02:01,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:02:01,135 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-19 05:02:01,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 91 [2021-11-19 05:02:15,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:02:15,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:02:15,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:02:15,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:02:15,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:02:15,860 INFO L354 Elim1Store]: treesize reduction 314, result has 0.3 percent of original size [2021-11-19 05:02:15,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 7 disjoint index pairs (out of 66 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 157 treesize of output 1 [2021-11-19 05:02:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 16 proven. 19 refuted. 2 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 05:02:15,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:02:20,950 INFO L354 Elim1Store]: treesize reduction 2651, result has 25.5 percent of original size [2021-11-19 05:02:20,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 363528 treesize of output 358209