./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 15:51:03,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:51:03,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:51:03,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:51:03,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:51:03,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:51:03,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:51:03,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:51:03,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:51:03,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:51:03,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:51:03,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:51:03,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:51:03,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:51:03,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:51:03,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:51:03,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:51:03,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:51:03,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:51:03,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:51:03,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:51:03,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:51:03,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:51:03,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:51:03,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:51:03,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:51:03,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:51:03,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:51:03,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:51:03,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:51:03,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:51:03,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:51:03,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:51:03,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:51:03,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:51:03,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:51:03,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:51:03,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:51:03,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:51:03,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:51:03,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:51:03,356 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-12-13 15:51:03,385 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:51:03,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:51:03,386 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:51:03,386 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:51:03,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:51:03,387 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:51:03,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:51:03,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:51:03,388 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:51:03,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:51:03,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:51:03,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:51:03,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:51:03,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:51:03,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:51:03,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:51:03,389 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:51:03,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:51:03,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:51:03,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:51:03,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:51:03,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:51:03,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:51:03,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:51:03,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:51:03,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:51:03,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:51:03,390 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:51:03,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:51:03,390 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:51:03,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:51:03,390 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:51:03,391 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2022-12-13 15:51:03,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:51:03,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:51:03,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:51:03,565 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:51:03,565 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:51:03,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-12-13 15:51:06,199 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:51:06,456 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:51:06,457 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-12-13 15:51:06,472 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/data/f3ad65f39/ffd0663a1c894c078cf06b285de3a864/FLAG758fb72fa [2022-12-13 15:51:06,483 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/data/f3ad65f39/ffd0663a1c894c078cf06b285de3a864 [2022-12-13 15:51:06,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:51:06,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:51:06,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:51:06,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:51:06,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:51:06,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:51:06" (1/1) ... [2022-12-13 15:51:06,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@374f5c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:06, skipping insertion in model container [2022-12-13 15:51:06,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:51:06" (1/1) ... [2022-12-13 15:51:06,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:51:06,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:51:06,777 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-12-13 15:51:06,783 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-12-13 15:51:07,280 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 15:51:07,284 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,285 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,285 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,285 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,286 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,295 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,295 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,297 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,297 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,298 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,299 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,300 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,300 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,346 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 15:51:07,346 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 15:51:07,347 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 15:51:07,350 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 15:51:07,351 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 15:51:07,352 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 15:51:07,542 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 15:51:07,542 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 15:51:07,543 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 15:51:07,544 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 15:51:07,545 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 15:51:07,545 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 15:51:07,546 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 15:51:07,546 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 15:51:07,547 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 15:51:07,547 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 15:51:07,547 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 15:51:07,646 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 15:51:07,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:51:07,673 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:51:07,682 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-12-13 15:51:07,682 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-12-13 15:51:07,707 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 15:51:07,710 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,710 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,710 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,711 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,711 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,717 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,717 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,718 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,718 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,719 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,720 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,720 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,720 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:51:07,726 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 15:51:07,726 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 15:51:07,727 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 15:51:07,730 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 15:51:07,731 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 15:51:07,731 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 15:51:07,749 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 15:51:07,750 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 15:51:07,751 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 15:51:07,751 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 15:51:07,752 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 15:51:07,753 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 15:51:07,753 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 15:51:07,754 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 15:51:07,754 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 15:51:07,754 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 15:51:07,755 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 15:51:07,772 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 15:51:07,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:51:07,983 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:51:07,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:07 WrapperNode [2022-12-13 15:51:07,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:51:07,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:51:07,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:51:07,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:51:07,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:07" (1/1) ... [2022-12-13 15:51:08,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:07" (1/1) ... [2022-12-13 15:51:08,064 INFO L138 Inliner]: procedures = 679, calls = 1044, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 133 [2022-12-13 15:51:08,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:51:08,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:51:08,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:51:08,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:51:08,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:07" (1/1) ... [2022-12-13 15:51:08,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:07" (1/1) ... [2022-12-13 15:51:08,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:07" (1/1) ... [2022-12-13 15:51:08,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:07" (1/1) ... [2022-12-13 15:51:08,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:07" (1/1) ... [2022-12-13 15:51:08,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:07" (1/1) ... [2022-12-13 15:51:08,096 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:07" (1/1) ... [2022-12-13 15:51:08,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:07" (1/1) ... [2022-12-13 15:51:08,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:51:08,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:51:08,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:51:08,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:51:08,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:07" (1/1) ... [2022-12-13 15:51:08,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:51:08,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:08,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:51:08,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:51:08,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:51:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 15:51:08,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 15:51:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-13 15:51:08,162 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-13 15:51:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 15:51:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-13 15:51:08,162 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-13 15:51:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:51:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 15:51:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_front [2022-12-13 15:51:08,162 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_front [2022-12-13 15:51:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:51:08,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:51:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-12-13 15:51:08,163 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-12-13 15:51:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 15:51:08,163 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 15:51:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:51:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 15:51:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 15:51:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-13 15:51:08,163 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-13 15:51:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-12-13 15:51:08,163 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-12-13 15:51:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:51:08,350 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:51:08,352 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:51:08,561 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:51:08,566 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:51:08,566 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 15:51:08,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:51:08 BoogieIcfgContainer [2022-12-13 15:51:08,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:51:08,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:51:08,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:51:08,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:51:08,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:51:06" (1/3) ... [2022-12-13 15:51:08,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122f9d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:51:08, skipping insertion in model container [2022-12-13 15:51:08,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:51:07" (2/3) ... [2022-12-13 15:51:08,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122f9d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:51:08, skipping insertion in model container [2022-12-13 15:51:08,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:51:08" (3/3) ... [2022-12-13 15:51:08,574 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2022-12-13 15:51:08,588 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:51:08,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:51:08,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:51:08,643 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@64c49ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:51:08,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 15:51:08,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 15:51:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-13 15:51:08,670 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:08,670 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:08,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:51:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:08,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1286081961, now seen corresponding path program 1 times [2022-12-13 15:51:08,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:08,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726481518] [2022-12-13 15:51:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:08,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:51:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:08,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:51:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:51:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 15:51:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 15:51:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 15:51:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 15:51:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 15:51:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 15:51:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-13 15:51:09,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:09,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726481518] [2022-12-13 15:51:09,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726481518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:09,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:51:09,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:51:09,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806709393] [2022-12-13 15:51:09,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:09,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 15:51:09,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:09,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 15:51:09,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 15:51:09,201 INFO L87 Difference]: Start difference. First operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-13 15:51:09,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:09,236 INFO L93 Difference]: Finished difference Result 188 states and 271 transitions. [2022-12-13 15:51:09,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 15:51:09,238 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 84 [2022-12-13 15:51:09,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:09,246 INFO L225 Difference]: With dead ends: 188 [2022-12-13 15:51:09,246 INFO L226 Difference]: Without dead ends: 93 [2022-12-13 15:51:09,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 15:51:09,254 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:09,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:51:09,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-13 15:51:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-12-13 15:51:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-12-13 15:51:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2022-12-13 15:51:09,297 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 84 [2022-12-13 15:51:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:09,298 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2022-12-13 15:51:09,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-13 15:51:09,298 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2022-12-13 15:51:09,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-13 15:51:09,302 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:09,303 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:09,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:51:09,303 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:51:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1287183985, now seen corresponding path program 1 times [2022-12-13 15:51:09,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:09,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056207441] [2022-12-13 15:51:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:09,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:51:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:51:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:51:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 15:51:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 15:51:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 15:51:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 15:51:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 15:51:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 15:51:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-13 15:51:09,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:09,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056207441] [2022-12-13 15:51:09,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056207441] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:09,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678779678] [2022-12-13 15:51:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:09,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:09,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:09,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:09,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:51:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:09,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-13 15:51:09,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:10,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 15:51:10,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 15:51:10,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:10,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:10,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-12-13 15:51:10,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:10,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:10,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-12-13 15:51:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-13 15:51:11,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:51:11,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678779678] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:11,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:51:11,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2022-12-13 15:51:11,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631808320] [2022-12-13 15:51:11,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:11,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 15:51:11,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:11,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 15:51:11,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:51:11,208 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-13 15:51:11,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:11,921 INFO L93 Difference]: Finished difference Result 253 states and 337 transitions. [2022-12-13 15:51:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:51:11,922 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 84 [2022-12-13 15:51:11,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:11,924 INFO L225 Difference]: With dead ends: 253 [2022-12-13 15:51:11,924 INFO L226 Difference]: Without dead ends: 177 [2022-12-13 15:51:11,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:51:11,926 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 112 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:11,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 604 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 15:51:11,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-12-13 15:51:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2022-12-13 15:51:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 113 states have (on average 1.2654867256637168) internal successors, (143), 115 states have internal predecessors, (143), 46 states have call successors, (46), 15 states have call predecessors, (46), 15 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-13 15:51:11,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 233 transitions. [2022-12-13 15:51:11,952 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 233 transitions. Word has length 84 [2022-12-13 15:51:11,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:11,953 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 233 transitions. [2022-12-13 15:51:11,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-13 15:51:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 233 transitions. [2022-12-13 15:51:11,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-13 15:51:11,955 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:11,955 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:11,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:51:12,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:12,157 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:51:12,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:12,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1848384117, now seen corresponding path program 1 times [2022-12-13 15:51:12,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:12,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757186105] [2022-12-13 15:51:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:12,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:12,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:51:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:12,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:51:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:12,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:51:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:12,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:12,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 15:51:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:12,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 15:51:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:12,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 15:51:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:12,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 15:51:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:12,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:12,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 15:51:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:12,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 15:51:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-13 15:51:12,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:12,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757186105] [2022-12-13 15:51:12,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757186105] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:12,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933795644] [2022-12-13 15:51:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:12,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:12,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:12,462 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:12,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:51:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:12,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 15:51:12,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:12,684 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-12-13 15:51:12,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-12-13 15:51:12,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-13 15:51:12,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-13 15:51:12,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 48 treesize of output 21 [2022-12-13 15:51:12,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-12-13 15:51:13,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:51:13,306 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:51:13,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 10 [2022-12-13 15:51:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 15:51:13,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:51:13,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933795644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:13,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:51:13,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2022-12-13 15:51:13,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94656039] [2022-12-13 15:51:13,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:13,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:51:13,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:13,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:51:13,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-12-13 15:51:13,313 INFO L87 Difference]: Start difference. First operand 175 states and 233 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-13 15:51:15,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:51:17,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:51:19,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:51:21,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:51:22,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:22,208 INFO L93 Difference]: Finished difference Result 265 states and 355 transitions. [2022-12-13 15:51:22,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:51:22,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 84 [2022-12-13 15:51:22,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:22,211 INFO L225 Difference]: With dead ends: 265 [2022-12-13 15:51:22,211 INFO L226 Difference]: Without dead ends: 180 [2022-12-13 15:51:22,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-12-13 15:51:22,213 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 330 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 154 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:22,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 574 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 462 Invalid, 4 Unknown, 0 Unchecked, 8.7s Time] [2022-12-13 15:51:22,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-12-13 15:51:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2022-12-13 15:51:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 115 states have (on average 1.2608695652173914) internal successors, (145), 117 states have internal predecessors, (145), 46 states have call successors, (46), 15 states have call predecessors, (46), 15 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-13 15:51:22,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 235 transitions. [2022-12-13 15:51:22,228 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 235 transitions. Word has length 84 [2022-12-13 15:51:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:22,229 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 235 transitions. [2022-12-13 15:51:22,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-13 15:51:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 235 transitions. [2022-12-13 15:51:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-13 15:51:22,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:22,230 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:22,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:51:22,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:22,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:51:22,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:22,433 INFO L85 PathProgramCache]: Analyzing trace with hash 4168327, now seen corresponding path program 1 times [2022-12-13 15:51:22,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:22,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012526790] [2022-12-13 15:51:22,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:22,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:51:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:51:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:51:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 15:51:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 15:51:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 15:51:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 15:51:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 15:51:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 15:51:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-13 15:51:22,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:22,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012526790] [2022-12-13 15:51:22,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012526790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:22,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938905560] [2022-12-13 15:51:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:22,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:22,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:22,689 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:22,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:51:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:22,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-13 15:51:22,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:22,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 15:51:22,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 15:51:22,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:22,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:22,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-12-13 15:51:22,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:22,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:22,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-12-13 15:51:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-13 15:51:23,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:51:23,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938905560] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:23,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:51:23,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2022-12-13 15:51:23,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451336938] [2022-12-13 15:51:23,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:23,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:51:23,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:23,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:51:23,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:51:23,736 INFO L87 Difference]: Start difference. First operand 177 states and 235 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-13 15:51:24,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:24,660 INFO L93 Difference]: Finished difference Result 274 states and 365 transitions. [2022-12-13 15:51:24,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:51:24,660 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 84 [2022-12-13 15:51:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:24,661 INFO L225 Difference]: With dead ends: 274 [2022-12-13 15:51:24,662 INFO L226 Difference]: Without dead ends: 184 [2022-12-13 15:51:24,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 12 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:51:24,663 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 124 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:24,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 836 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 15:51:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-13 15:51:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 179. [2022-12-13 15:51:24,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 117 states have (on average 1.2564102564102564) internal successors, (147), 119 states have internal predecessors, (147), 46 states have call successors, (46), 15 states have call predecessors, (46), 15 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-13 15:51:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 237 transitions. [2022-12-13 15:51:24,677 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 237 transitions. Word has length 84 [2022-12-13 15:51:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:24,677 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 237 transitions. [2022-12-13 15:51:24,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-13 15:51:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 237 transitions. [2022-12-13 15:51:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-13 15:51:24,678 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:24,678 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:24,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:51:24,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:24,880 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:51:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:24,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2104360829, now seen corresponding path program 1 times [2022-12-13 15:51:24,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:24,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534786451] [2022-12-13 15:51:24,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:24,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:25,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:51:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:25,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:51:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:25,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:51:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:25,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:25,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 15:51:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:25,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 15:51:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:25,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 15:51:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:25,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 15:51:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:25,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:25,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 15:51:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:25,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 15:51:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 15:51:25,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:25,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534786451] [2022-12-13 15:51:25,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534786451] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:25,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37072942] [2022-12-13 15:51:25,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:25,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:25,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:25,459 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:25,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:51:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:25,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 15:51:25,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:25,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:25,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 15:51:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 15:51:26,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:51:26,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37072942] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:26,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:51:26,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 21 [2022-12-13 15:51:26,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215201104] [2022-12-13 15:51:26,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:26,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:51:26,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:26,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:51:26,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:51:26,186 INFO L87 Difference]: Start difference. First operand 179 states and 237 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-13 15:51:26,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:26,843 INFO L93 Difference]: Finished difference Result 284 states and 376 transitions. [2022-12-13 15:51:26,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:51:26,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 84 [2022-12-13 15:51:26,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:26,844 INFO L225 Difference]: With dead ends: 284 [2022-12-13 15:51:26,844 INFO L226 Difference]: Without dead ends: 188 [2022-12-13 15:51:26,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-12-13 15:51:26,846 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 168 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:26,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 759 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:51:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-12-13 15:51:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 181. [2022-12-13 15:51:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 119 states have (on average 1.2521008403361344) internal successors, (149), 121 states have internal predecessors, (149), 46 states have call successors, (46), 15 states have call predecessors, (46), 15 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-13 15:51:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 239 transitions. [2022-12-13 15:51:26,859 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 239 transitions. Word has length 84 [2022-12-13 15:51:26,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:26,859 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 239 transitions. [2022-12-13 15:51:26,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-13 15:51:26,859 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 239 transitions. [2022-12-13 15:51:26,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-13 15:51:26,860 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:26,860 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:26,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 15:51:27,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:27,062 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:51:27,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:27,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1176316033, now seen corresponding path program 1 times [2022-12-13 15:51:27,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:27,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749743967] [2022-12-13 15:51:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:27,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:51:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:51:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:51:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 15:51:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 15:51:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 15:51:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 15:51:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 15:51:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 15:51:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 15:51:27,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:27,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749743967] [2022-12-13 15:51:27,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749743967] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:27,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564565041] [2022-12-13 15:51:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:27,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:27,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:27,287 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:27,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:51:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:51:27,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 15:51:27,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:51:27,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564565041] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:27,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:51:27,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-12-13 15:51:27,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409893725] [2022-12-13 15:51:27,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:27,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:51:27,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:27,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:51:27,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:51:27,483 INFO L87 Difference]: Start difference. First operand 181 states and 239 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-13 15:51:27,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:27,629 INFO L93 Difference]: Finished difference Result 364 states and 489 transitions. [2022-12-13 15:51:27,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:51:27,629 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 84 [2022-12-13 15:51:27,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:27,630 INFO L225 Difference]: With dead ends: 364 [2022-12-13 15:51:27,630 INFO L226 Difference]: Without dead ends: 174 [2022-12-13 15:51:27,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:51:27,631 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 153 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:27,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 487 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:51:27,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-12-13 15:51:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-12-13 15:51:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 114 states have internal predecessors, (136), 46 states have call successors, (46), 15 states have call predecessors, (46), 15 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-13 15:51:27,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 226 transitions. [2022-12-13 15:51:27,643 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 226 transitions. Word has length 84 [2022-12-13 15:51:27,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:27,643 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 226 transitions. [2022-12-13 15:51:27,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-13 15:51:27,644 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 226 transitions. [2022-12-13 15:51:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-13 15:51:27,644 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:27,644 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:27,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 15:51:27,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:27,845 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:51:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:27,845 INFO L85 PathProgramCache]: Analyzing trace with hash -350169043, now seen corresponding path program 1 times [2022-12-13 15:51:27,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:27,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673409877] [2022-12-13 15:51:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:27,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:51:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:51:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 15:51:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 15:51:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:27,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 15:51:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:28,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 15:51:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:28,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 15:51:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:28,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:28,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-12-13 15:51:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:28,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-12-13 15:51:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-13 15:51:28,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:28,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673409877] [2022-12-13 15:51:28,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673409877] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:28,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082229529] [2022-12-13 15:51:28,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:28,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:28,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:28,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:28,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:51:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:28,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-13 15:51:28,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:28,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:51:28,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 15:51:28,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 15:51:28,310 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:51:28,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 15:51:28,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:28,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-12-13 15:51:28,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-13 15:51:28,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:28,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-12-13 15:51:28,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-13 15:51:28,407 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-12-13 15:51:28,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 123 [2022-12-13 15:51:28,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:28,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:28,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 98 [2022-12-13 15:51:28,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:28,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2022-12-13 15:51:28,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-13 15:51:28,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:28,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:51:28,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-12-13 15:51:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:41,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:51:42,185 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse1 (+ 16 |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|))) (and (forall ((v_ArrVal_576 Int) (v_ArrVal_570 (Array Int Int)) (v_ArrVal_577 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_577) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_570) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_576)) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) .cse1))) (forall ((v_ArrVal_572 Int) (v_ArrVal_573 (Array Int Int)) (v_ArrVal_574 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_573) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_574) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_572)) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) .cse1) 0)))) is different from false [2022-12-13 15:51:42,373 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:51:42,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-12-13 15:51:42,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:51:42,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 264 treesize of output 256 [2022-12-13 15:51:42,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 266 [2022-12-13 15:51:42,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 90 [2022-12-13 15:51:42,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-13 15:51:42,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:51:42,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 83 [2022-12-13 15:51:42,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:51:42,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-12-13 15:51:42,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:51:42,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 148 [2022-12-13 15:51:42,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 140 [2022-12-13 15:51:42,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 65 [2022-12-13 15:51:42,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-13 15:51:42,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:51:42,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2022-12-13 15:51:43,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082229529] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:43,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:51:43,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 26] total 30 [2022-12-13 15:51:43,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391431157] [2022-12-13 15:51:43,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:51:43,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:51:43,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:43,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:51:43,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1125, Unknown=105, NotChecked=72, Total=1482 [2022-12-13 15:51:43,094 INFO L87 Difference]: Start difference. First operand 174 states and 226 transitions. Second operand has 30 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (21), 12 states have call predecessors, (21), 13 states have call successors, (21) [2022-12-13 15:51:48,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:48,576 INFO L93 Difference]: Finished difference Result 300 states and 393 transitions. [2022-12-13 15:51:48,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 15:51:48,577 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (21), 12 states have call predecessors, (21), 13 states have call successors, (21) Word has length 86 [2022-12-13 15:51:48,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:48,580 INFO L225 Difference]: With dead ends: 300 [2022-12-13 15:51:48,580 INFO L226 Difference]: Without dead ends: 219 [2022-12-13 15:51:48,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=410, Invalid=2988, Unknown=266, NotChecked=118, Total=3782 [2022-12-13 15:51:48,581 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 133 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 61 mSolverCounterUnsat, 285 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 285 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:48,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1519 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 998 Invalid, 285 Unknown, 0 Unchecked, 2.9s Time] [2022-12-13 15:51:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-12-13 15:51:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2022-12-13 15:51:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 137 states have (on average 1.2043795620437956) internal successors, (165), 140 states have internal predecessors, (165), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (51), 47 states have call predecessors, (51), 49 states have call successors, (51) [2022-12-13 15:51:48,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 267 transitions. [2022-12-13 15:51:48,604 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 267 transitions. Word has length 86 [2022-12-13 15:51:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:48,604 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 267 transitions. [2022-12-13 15:51:48,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (21), 12 states have call predecessors, (21), 13 states have call successors, (21) [2022-12-13 15:51:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 267 transitions. [2022-12-13 15:51:48,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-13 15:51:48,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:48,606 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:48,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 15:51:48,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 15:51:48,807 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:51:48,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:48,807 INFO L85 PathProgramCache]: Analyzing trace with hash -63934009, now seen corresponding path program 1 times [2022-12-13 15:51:48,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:48,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280660072] [2022-12-13 15:51:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:48,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:48,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:51:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:48,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:51:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:48,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:51:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:48,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:48,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 15:51:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:48,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 15:51:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 15:51:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 15:51:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-12-13 15:51:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-12-13 15:51:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 15:51:49,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:49,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280660072] [2022-12-13 15:51:49,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280660072] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:49,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755839716] [2022-12-13 15:51:49,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:49,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:49,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:49,101 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:49,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 15:51:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:51:49,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 15:51:49,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:51:49,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755839716] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:49,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:51:49,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2022-12-13 15:51:49,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512915501] [2022-12-13 15:51:49,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:49,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 15:51:49,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:49,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 15:51:49,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:51:49,306 INFO L87 Difference]: Start difference. First operand 208 states and 267 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-13 15:51:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:49,521 INFO L93 Difference]: Finished difference Result 362 states and 471 transitions. [2022-12-13 15:51:49,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:51:49,521 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2022-12-13 15:51:49,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:49,523 INFO L225 Difference]: With dead ends: 362 [2022-12-13 15:51:49,523 INFO L226 Difference]: Without dead ends: 208 [2022-12-13 15:51:49,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:51:49,525 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 143 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:49,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 521 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:51:49,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-12-13 15:51:49,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-12-13 15:51:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 140 states have internal predecessors, (163), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (51), 47 states have call predecessors, (51), 49 states have call successors, (51) [2022-12-13 15:51:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 265 transitions. [2022-12-13 15:51:49,544 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 265 transitions. Word has length 88 [2022-12-13 15:51:49,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:49,544 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 265 transitions. [2022-12-13 15:51:49,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-13 15:51:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 265 transitions. [2022-12-13 15:51:49,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-13 15:51:49,546 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:49,546 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-12-13 15:51:49,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 15:51:49,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:49,747 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:51:49,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:49,747 INFO L85 PathProgramCache]: Analyzing trace with hash -903347754, now seen corresponding path program 1 times [2022-12-13 15:51:49,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:49,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780823764] [2022-12-13 15:51:49,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:49,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:51:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:51:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 15:51:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 15:51:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 15:51:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 15:51:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-12-13 15:51:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 15:51:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-12-13 15:51:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-13 15:51:49,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780823764] [2022-12-13 15:51:49,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780823764] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542485408] [2022-12-13 15:51:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:49,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:49,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:49,958 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:49,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 15:51:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:50,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 15:51:50,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 15:51:50,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:51:50,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542485408] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:50,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:51:50,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2022-12-13 15:51:50,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017480455] [2022-12-13 15:51:50,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:50,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:51:50,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:50,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:51:50,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:51:50,158 INFO L87 Difference]: Start difference. First operand 208 states and 265 transitions. Second operand has 10 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-13 15:51:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:50,375 INFO L93 Difference]: Finished difference Result 380 states and 498 transitions. [2022-12-13 15:51:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:51:50,376 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 90 [2022-12-13 15:51:50,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:50,378 INFO L225 Difference]: With dead ends: 380 [2022-12-13 15:51:50,378 INFO L226 Difference]: Without dead ends: 224 [2022-12-13 15:51:50,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:51:50,379 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 178 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:50,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 576 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:51:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-12-13 15:51:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 210. [2022-12-13 15:51:50,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 139 states have (on average 1.1870503597122302) internal successors, (165), 142 states have internal predecessors, (165), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (51), 47 states have call predecessors, (51), 49 states have call successors, (51) [2022-12-13 15:51:50,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 267 transitions. [2022-12-13 15:51:50,406 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 267 transitions. Word has length 90 [2022-12-13 15:51:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:50,406 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 267 transitions. [2022-12-13 15:51:50,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-13 15:51:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 267 transitions. [2022-12-13 15:51:50,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-13 15:51:50,408 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:50,408 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-12-13 15:51:50,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 15:51:50,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:50,610 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:51:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:50,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1868931672, now seen corresponding path program 1 times [2022-12-13 15:51:50,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:50,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78077974] [2022-12-13 15:51:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:50,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:50,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:51:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:50,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:51:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:50,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 15:51:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:50,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:50,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 15:51:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:50,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 15:51:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:50,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-12-13 15:51:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:50,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-12-13 15:51:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:50,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:50,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-12-13 15:51:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:50,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-12-13 15:51:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-13 15:51:50,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:50,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78077974] [2022-12-13 15:51:50,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78077974] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:50,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427846190] [2022-12-13 15:51:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:50,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:50,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:50,846 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:50,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 15:51:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:50,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 15:51:50,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-13 15:51:50,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:51:50,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427846190] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:51:50,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:51:50,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-13 15:51:50,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687032190] [2022-12-13 15:51:50,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:51:50,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:51:50,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:50,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:51:50,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:51:50,977 INFO L87 Difference]: Start difference. First operand 210 states and 267 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-13 15:51:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:51,015 INFO L93 Difference]: Finished difference Result 372 states and 490 transitions. [2022-12-13 15:51:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:51:51,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 91 [2022-12-13 15:51:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:51,016 INFO L225 Difference]: With dead ends: 372 [2022-12-13 15:51:51,016 INFO L226 Difference]: Without dead ends: 222 [2022-12-13 15:51:51,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:51:51,017 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 4 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:51,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 235 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:51:51,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-12-13 15:51:51,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 212. [2022-12-13 15:51:51,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 141 states have (on average 1.1843971631205674) internal successors, (167), 144 states have internal predecessors, (167), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (51), 47 states have call predecessors, (51), 49 states have call successors, (51) [2022-12-13 15:51:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 269 transitions. [2022-12-13 15:51:51,033 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 269 transitions. Word has length 91 [2022-12-13 15:51:51,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:51,033 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 269 transitions. [2022-12-13 15:51:51,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-13 15:51:51,033 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 269 transitions. [2022-12-13 15:51:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-13 15:51:51,034 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:51,034 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-12-13 15:51:51,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 15:51:51,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 15:51:51,235 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:51:51,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:51,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2024973924, now seen corresponding path program 1 times [2022-12-13 15:51:51,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:51,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534790233] [2022-12-13 15:51:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:51,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:51,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:51:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:51,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:51:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:51,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 15:51:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:51,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:51,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 15:51:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:51,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 15:51:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:51,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:51:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:51,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-12-13 15:51:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:51,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-12-13 15:51:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:51,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:51:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:51,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-12-13 15:51:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:51,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-12-13 15:51:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-13 15:51:51,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:51,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534790233] [2022-12-13 15:51:51,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534790233] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:51,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246125875] [2022-12-13 15:51:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:51,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:51,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:51,477 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:51,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 15:51:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:51,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 15:51:51,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:51,644 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:51:51,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 15:51:51,652 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:51:51,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 15:51:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 15:51:52,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:51:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-13 15:51:52,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246125875] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:51:52,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:51:52,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 9] total 21 [2022-12-13 15:51:52,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062681235] [2022-12-13 15:51:52,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:51:52,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:51:52,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:51:52,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:51:52,478 INFO L87 Difference]: Start difference. First operand 212 states and 269 transitions. Second operand has 21 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 7 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-12-13 15:51:54,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:51:56,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:51:58,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:52:00,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:52:02,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:52:04,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:52:06,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:52:08,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:52:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:52:09,494 INFO L93 Difference]: Finished difference Result 435 states and 547 transitions. [2022-12-13 15:52:09,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 15:52:09,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 7 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 101 [2022-12-13 15:52:09,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:52:09,496 INFO L225 Difference]: With dead ends: 435 [2022-12-13 15:52:09,496 INFO L226 Difference]: Without dead ends: 279 [2022-12-13 15:52:09,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 206 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 15:52:09,497 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 161 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 43 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:52:09,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 1020 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 909 Invalid, 8 Unknown, 0 Unchecked, 16.7s Time] [2022-12-13 15:52:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-12-13 15:52:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 243. [2022-12-13 15:52:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 165 states have (on average 1.1818181818181819) internal successors, (195), 170 states have internal predecessors, (195), 51 states have call successors, (51), 24 states have call predecessors, (51), 26 states have return successors, (55), 48 states have call predecessors, (55), 49 states have call successors, (55) [2022-12-13 15:52:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 301 transitions. [2022-12-13 15:52:09,517 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 301 transitions. Word has length 101 [2022-12-13 15:52:09,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:52:09,517 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 301 transitions. [2022-12-13 15:52:09,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 7 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-12-13 15:52:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 301 transitions. [2022-12-13 15:52:09,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-13 15:52:09,518 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:52:09,518 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-12-13 15:52:09,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 15:52:09,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:52:09,720 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:52:09,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:52:09,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1615237797, now seen corresponding path program 1 times [2022-12-13 15:52:09,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:52:09,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484962441] [2022-12-13 15:52:09,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:52:09,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:52:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:09,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:52:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:09,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:52:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:09,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 15:52:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:09,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:52:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:09,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 15:52:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:09,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 15:52:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:10,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:52:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:10,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-12-13 15:52:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:10,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-12-13 15:52:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:10,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:52:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:10,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-12-13 15:52:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:10,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-12-13 15:52:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-13 15:52:10,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:52:10,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484962441] [2022-12-13 15:52:10,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484962441] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:52:10,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457731673] [2022-12-13 15:52:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:52:10,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:52:10,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:52:10,107 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:52:10,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 15:52:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:10,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 15:52:10,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:52:10,266 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:52:10,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 15:52:10,276 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:52:10,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 15:52:12,392 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_3| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_3|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_3| 24)) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_3| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_3|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_3| 24)) 0)))) is different from true [2022-12-13 15:52:14,476 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_front_~list.offset_BEFORE_CALL_36 Int) (v_aws_linked_list_front_~list.base_BEFORE_CALL_39 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_39) (+ v_aws_linked_list_front_~list.offset_BEFORE_CALL_36 24)) 0))) (exists ((v_aws_linked_list_front_~list.offset_BEFORE_CALL_36 Int) (v_aws_linked_list_front_~list.base_BEFORE_CALL_39 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_39) (+ v_aws_linked_list_front_~list.offset_BEFORE_CALL_36 24)) 0)))) is different from true [2022-12-13 15:52:22,531 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_front_~list.offset_BEFORE_CALL_37 Int) (v_aws_linked_list_front_~list.base_BEFORE_CALL_40 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_40) (+ v_aws_linked_list_front_~list.offset_BEFORE_CALL_37 24)) 0))) (exists ((v_aws_linked_list_front_~list.offset_BEFORE_CALL_37 Int) (v_aws_linked_list_front_~list.base_BEFORE_CALL_40 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_40) (+ v_aws_linked_list_front_~list.offset_BEFORE_CALL_37 24)) 0)))) is different from true [2022-12-13 15:52:24,604 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_front_~list.offset_BEFORE_CALL_38 Int) (v_aws_linked_list_front_~list.base_BEFORE_CALL_41 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_41) (+ v_aws_linked_list_front_~list.offset_BEFORE_CALL_38 24)) 0))) (exists ((v_aws_linked_list_front_~list.offset_BEFORE_CALL_38 Int) (v_aws_linked_list_front_~list.base_BEFORE_CALL_41 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_41) (+ v_aws_linked_list_front_~list.offset_BEFORE_CALL_38 24)) 0)))) is different from true [2022-12-13 15:52:26,657 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_front_~list.offset_BEFORE_CALL_39 Int) (v_aws_linked_list_front_~list.base_BEFORE_CALL_42 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_42) (+ v_aws_linked_list_front_~list.offset_BEFORE_CALL_39 24)) 0))) (exists ((v_aws_linked_list_front_~list.offset_BEFORE_CALL_39 Int) (v_aws_linked_list_front_~list.base_BEFORE_CALL_42 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_42) (+ v_aws_linked_list_front_~list.offset_BEFORE_CALL_39 24)) 0)))) is different from true [2022-12-13 15:52:34,731 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:52:42,863 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:52:50,989 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:52:57,091 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:52:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 49 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 12 not checked. [2022-12-13 15:52:57,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:52:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-13 15:52:59,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457731673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:52:59,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:52:59,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 11] total 30 [2022-12-13 15:52:59,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103785140] [2022-12-13 15:52:59,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:52:59,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:52:59,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:52:59,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:52:59,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=527, Unknown=9, NotChecked=250, Total=870 [2022-12-13 15:52:59,567 INFO L87 Difference]: Start difference. First operand 243 states and 301 transitions. Second operand has 30 states, 30 states have (on average 4.266666666666667) internal successors, (128), 29 states have internal predecessors, (128), 7 states have call successors, (26), 7 states have call predecessors, (26), 9 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-12-13 15:53:01,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:03,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:07,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:11,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:15,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:17,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:19,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:21,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:27,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:29,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:31,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:33,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:42,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:44,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:46,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:48,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:53:59,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:54:01,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:54:07,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:54:09,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:54:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:54:09,286 INFO L93 Difference]: Finished difference Result 597 states and 779 transitions. [2022-12-13 15:54:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 15:54:09,287 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.266666666666667) internal successors, (128), 29 states have internal predecessors, (128), 7 states have call successors, (26), 7 states have call predecessors, (26), 9 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 101 [2022-12-13 15:54:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:54:09,289 INFO L225 Difference]: With dead ends: 597 [2022-12-13 15:54:09,289 INFO L226 Difference]: Without dead ends: 426 [2022-12-13 15:54:09,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 209 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 77.7s TimeCoverageRelationStatistics Valid=520, Invalid=2129, Unknown=23, NotChecked=520, Total=3192 [2022-12-13 15:54:09,290 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 132 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 21 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 2498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 1403 IncrementalHoareTripleChecker+Unchecked, 40.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:54:09,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1586 Invalid, 2498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1054 Invalid, 20 Unknown, 1403 Unchecked, 40.7s Time] [2022-12-13 15:54:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-12-13 15:54:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 358. [2022-12-13 15:54:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 261 states have (on average 1.2298850574712643) internal successors, (321), 268 states have internal predecessors, (321), 59 states have call successors, (59), 33 states have call predecessors, (59), 37 states have return successors, (74), 56 states have call predecessors, (74), 57 states have call successors, (74) [2022-12-13 15:54:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 454 transitions. [2022-12-13 15:54:09,317 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 454 transitions. Word has length 101 [2022-12-13 15:54:09,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:54:09,317 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 454 transitions. [2022-12-13 15:54:09,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.266666666666667) internal successors, (128), 29 states have internal predecessors, (128), 7 states have call successors, (26), 7 states have call predecessors, (26), 9 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-12-13 15:54:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 454 transitions. [2022-12-13 15:54:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-13 15:54:09,318 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:54:09,318 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-12-13 15:54:09,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 15:54:09,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 15:54:09,518 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:54:09,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:09,519 INFO L85 PathProgramCache]: Analyzing trace with hash -718154841, now seen corresponding path program 1 times [2022-12-13 15:54:09,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:09,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127675190] [2022-12-13 15:54:09,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:09,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:09,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:54:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:09,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:54:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:09,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 15:54:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:09,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:54:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:09,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 15:54:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:09,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 15:54:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:09,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:54:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:09,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-12-13 15:54:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:09,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-12-13 15:54:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:09,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:54:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:09,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-12-13 15:54:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:09,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-12-13 15:54:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-13 15:54:09,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:09,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127675190] [2022-12-13 15:54:09,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127675190] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:54:09,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752806859] [2022-12-13 15:54:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:09,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:09,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:54:09,671 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:54:09,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 15:54:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:09,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:54:09,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:54:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 15:54:09,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:54:09,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752806859] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:54:09,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:54:09,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-12-13 15:54:09,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616855476] [2022-12-13 15:54:09,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:54:09,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:54:09,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:09,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:54:09,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:54:09,838 INFO L87 Difference]: Start difference. First operand 358 states and 454 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-13 15:54:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:54:09,873 INFO L93 Difference]: Finished difference Result 494 states and 636 transitions. [2022-12-13 15:54:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:54:09,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-12-13 15:54:09,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:54:09,875 INFO L225 Difference]: With dead ends: 494 [2022-12-13 15:54:09,875 INFO L226 Difference]: Without dead ends: 308 [2022-12-13 15:54:09,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:54:09,876 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 8 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:54:09,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 355 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:54:09,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-12-13 15:54:09,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 306. [2022-12-13 15:54:09,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 219 states have (on average 1.1917808219178083) internal successors, (261), 224 states have internal predecessors, (261), 53 states have call successors, (53), 31 states have call predecessors, (53), 33 states have return successors, (61), 50 states have call predecessors, (61), 51 states have call successors, (61) [2022-12-13 15:54:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 375 transitions. [2022-12-13 15:54:09,900 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 375 transitions. Word has length 101 [2022-12-13 15:54:09,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:54:09,900 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 375 transitions. [2022-12-13 15:54:09,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-13 15:54:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 375 transitions. [2022-12-13 15:54:09,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-13 15:54:09,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:54:09,901 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-12-13 15:54:09,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 15:54:10,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 15:54:10,101 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:54:10,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:10,102 INFO L85 PathProgramCache]: Analyzing trace with hash -550482073, now seen corresponding path program 1 times [2022-12-13 15:54:10,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:10,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476063743] [2022-12-13 15:54:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:10,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:10,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:54:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:10,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:54:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:10,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 15:54:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:10,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:54:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:10,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 15:54:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:10,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 15:54:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:10,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:54:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:10,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-12-13 15:54:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:10,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-12-13 15:54:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:10,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:54:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:10,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-12-13 15:54:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:10,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-12-13 15:54:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-13 15:54:10,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:10,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476063743] [2022-12-13 15:54:10,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476063743] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:54:10,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078137484] [2022-12-13 15:54:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:10,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:10,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:54:10,209 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:54:10,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 15:54:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:10,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:54:10,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:54:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 15:54:10,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:54:10,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078137484] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:54:10,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:54:10,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-12-13 15:54:10,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355776086] [2022-12-13 15:54:10,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:54:10,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:54:10,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:10,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:54:10,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:54:10,334 INFO L87 Difference]: Start difference. First operand 306 states and 375 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-13 15:54:10,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:54:10,376 INFO L93 Difference]: Finished difference Result 435 states and 546 transitions. [2022-12-13 15:54:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:54:10,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-12-13 15:54:10,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:54:10,379 INFO L225 Difference]: With dead ends: 435 [2022-12-13 15:54:10,379 INFO L226 Difference]: Without dead ends: 297 [2022-12-13 15:54:10,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:54:10,380 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 3 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:54:10,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 347 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:54:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-12-13 15:54:10,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 290. [2022-12-13 15:54:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 203 states have (on average 1.1527093596059113) internal successors, (234), 208 states have internal predecessors, (234), 53 states have call successors, (53), 31 states have call predecessors, (53), 33 states have return successors, (61), 50 states have call predecessors, (61), 51 states have call successors, (61) [2022-12-13 15:54:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 348 transitions. [2022-12-13 15:54:10,405 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 348 transitions. Word has length 101 [2022-12-13 15:54:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:54:10,405 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 348 transitions. [2022-12-13 15:54:10,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-13 15:54:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 348 transitions. [2022-12-13 15:54:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-13 15:54:10,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:54:10,406 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2022-12-13 15:54:10,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 15:54:10,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 15:54:10,607 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:54:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:10,608 INFO L85 PathProgramCache]: Analyzing trace with hash 753240419, now seen corresponding path program 1 times [2022-12-13 15:54:10,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:10,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633894665] [2022-12-13 15:54:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:10,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:11,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:54:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:11,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:54:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:11,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 15:54:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:11,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:54:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:11,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 15:54:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:11,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 15:54:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:11,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:54:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:11,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-12-13 15:54:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:11,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-12-13 15:54:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:11,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:54:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:11,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-12-13 15:54:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:11,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-12-13 15:54:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 15:54:11,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:11,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633894665] [2022-12-13 15:54:11,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633894665] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:54:11,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793080617] [2022-12-13 15:54:11,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:11,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:11,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:54:11,312 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:54:11,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 15:54:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:11,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-13 15:54:11,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:54:11,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:54:11,620 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:54:11,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 15:54:11,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-13 15:54:11,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 15:54:11,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:54:11,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 19 [2022-12-13 15:54:11,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2022-12-13 15:54:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 15:54:12,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:54:12,401 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1522 (Array Int Int)) (v_ArrVal_1520 (Array Int Int)) (v_ArrVal_1521 Int)) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1522) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1520) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1521)) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|) (+ 16 |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|)))) is different from false [2022-12-13 15:54:12,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:54:12,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-12-13 15:54:12,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:54:12,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 149 [2022-12-13 15:54:12,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 144 [2022-12-13 15:54:12,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 142 [2022-12-13 15:54:12,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-13 15:54:12,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-13 15:54:12,519 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:54:12,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 50 [2022-12-13 15:54:12,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:54:12,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 64 [2022-12-13 15:54:12,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793080617] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:54:12,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:54:12,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2022-12-13 15:54:12,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363644778] [2022-12-13 15:54:12,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:54:12,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 15:54:12,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:54:12,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 15:54:12,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1083, Unknown=1, NotChecked=66, Total=1260 [2022-12-13 15:54:12,842 INFO L87 Difference]: Start difference. First operand 290 states and 348 transitions. Second operand has 25 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2022-12-13 15:54:14,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:54:14,442 INFO L93 Difference]: Finished difference Result 438 states and 539 transitions. [2022-12-13 15:54:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 15:54:14,443 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) Word has length 102 [2022-12-13 15:54:14,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:54:14,444 INFO L225 Difference]: With dead ends: 438 [2022-12-13 15:54:14,444 INFO L226 Difference]: Without dead ends: 314 [2022-12-13 15:54:14,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 198 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=280, Invalid=2075, Unknown=1, NotChecked=94, Total=2450 [2022-12-13 15:54:14,445 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 385 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:54:14,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 1670 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1793 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 15:54:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-12-13 15:54:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 291. [2022-12-13 15:54:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 204 states have (on average 1.1519607843137254) internal successors, (235), 209 states have internal predecessors, (235), 53 states have call successors, (53), 31 states have call predecessors, (53), 33 states have return successors, (61), 50 states have call predecessors, (61), 51 states have call successors, (61) [2022-12-13 15:54:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 349 transitions. [2022-12-13 15:54:14,471 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 349 transitions. Word has length 102 [2022-12-13 15:54:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:54:14,471 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 349 transitions. [2022-12-13 15:54:14,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2022-12-13 15:54:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 349 transitions. [2022-12-13 15:54:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-13 15:54:14,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:54:14,477 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:54:14,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 15:54:14,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 15:54:14,677 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:54:14,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:54:14,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1963183712, now seen corresponding path program 1 times [2022-12-13 15:54:14,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:54:14,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916790515] [2022-12-13 15:54:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:14,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:54:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:54:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:54:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:54:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:54:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 15:54:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 15:54:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:54:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 15:54:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 15:54:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:54:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-12-13 15:54:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-12-13 15:54:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:54:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 15:54:15,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:54:15,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916790515] [2022-12-13 15:54:15,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916790515] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:54:15,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057603798] [2022-12-13 15:54:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:54:15,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:54:15,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:54:15,561 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:54:15,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87cacb2-789e-46f4-9a7c-41dea3125e42/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 15:54:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:54:15,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 127 conjunts are in the unsatisfiable core [2022-12-13 15:54:15,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:54:15,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-13 15:54:15,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:54:15,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-13 15:54:15,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:54:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 66 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 15:54:18,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:54:31,314 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:54:41,457 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:54:42,877 INFO L321 Elim1Store]: treesize reduction 23, result has 86.1 percent of original size [2022-12-13 15:54:42,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 5496 treesize of output 5251 [2022-12-13 15:54:43,156 INFO L321 Elim1Store]: treesize reduction 30, result has 85.8 percent of original size [2022-12-13 15:54:43,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 38914 treesize of output 36352 [2022-12-13 15:54:43,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:54:43,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 46586 treesize of output 44408 [2022-12-13 15:54:44,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:54:44,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 43814 treesize of output 42269 [2022-12-13 15:54:45,073 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:54:45,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 48024 treesize of output 46655 [2022-12-13 15:54:47,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:54:47,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 45292 treesize of output 44123