./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc --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 fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- 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-5e519f3 [2022-11-02 20:13:18,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:13:18,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:13:18,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:13:18,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:13:18,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:13:18,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:13:18,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:13:18,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:13:18,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:13:18,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:13:18,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:13:18,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:13:18,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:13:18,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:13:18,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:13:18,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:13:18,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:13:18,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:13:18,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:13:18,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:13:18,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:13:18,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:13:18,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:13:18,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:13:18,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:13:18,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:13:18,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:13:18,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:13:18,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:13:18,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:13:18,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:13:18,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:13:18,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:13:18,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:13:18,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:13:18,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:13:18,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:13:18,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:13:18,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:13:18,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:13:18,572 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:13:18,618 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:13:18,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:13:18,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:13:18,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:13:18,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:13:18,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:13:18,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:13:18,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:13:18,622 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:13:18,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:13:18,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:13:18,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:13:18,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:13:18,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:13:18,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:13:18,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:13:18,625 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:13:18,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:13:18,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:13:18,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:13:18,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:13:18,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:13:18,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:13:18,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:13:18,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:13:18,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:13:18,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:13:18,627 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:13:18,627 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:13:18,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:13:18,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2022-11-02 20:13:18,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:13:18,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:13:18,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:13:18,998 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:13:18,999 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:13:19,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2022-11-02 20:13:19,083 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/data/9cd93fce7/b7a7c16e48b94a27b1173f8aa39cb8e1/FLAGb50193084 [2022-11-02 20:13:20,139 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:13:20,141 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2022-11-02 20:13:20,189 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/data/9cd93fce7/b7a7c16e48b94a27b1173f8aa39cb8e1/FLAGb50193084 [2022-11-02 20:13:20,562 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/data/9cd93fce7/b7a7c16e48b94a27b1173f8aa39cb8e1 [2022-11-02 20:13:20,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:13:20,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:13:20,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:13:20,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:13:20,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:13:20,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:13:20" (1/1) ... [2022-11-02 20:13:20,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6238c5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:20, skipping insertion in model container [2022-11-02 20:13:20,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:13:20" (1/1) ... [2022-11-02 20:13:20,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:13:20,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:13:21,084 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2022-11-02 20:13:21,093 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2022-11-02 20:13:22,139 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,140 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,141 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,142 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,144 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,161 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,162 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,165 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,166 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,169 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,170 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,171 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,172 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,658 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 20:13:22,664 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 20:13:22,665 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 20:13:22,666 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 20:13:22,668 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 20:13:22,669 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 20:13:22,670 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 20:13:22,671 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 20:13:22,671 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 20:13:22,672 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 20:13:22,866 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 20:13:22,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:13:22,917 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:13:22,934 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2022-11-02 20:13:22,935 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2022-11-02 20:13:22,986 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,987 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,987 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,988 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:22,989 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:23,000 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:23,001 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:23,003 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:23,004 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:23,005 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:23,007 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:23,007 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:23,008 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:13:23,060 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 20:13:23,062 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 20:13:23,063 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 20:13:23,064 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 20:13:23,066 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 20:13:23,067 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 20:13:23,068 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 20:13:23,068 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 20:13:23,069 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 20:13:23,070 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 20:13:23,122 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 20:13:23,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:13:23,474 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:13:23,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:23 WrapperNode [2022-11-02 20:13:23,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:13:23,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:13:23,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:13:23,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:13:23,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:23" (1/1) ... [2022-11-02 20:13:23,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:23" (1/1) ... [2022-11-02 20:13:23,669 INFO L138 Inliner]: procedures = 679, calls = 1080, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 214 [2022-11-02 20:13:23,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:13:23,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:13:23,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:13:23,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:13:23,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:23" (1/1) ... [2022-11-02 20:13:23,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:23" (1/1) ... [2022-11-02 20:13:23,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:23" (1/1) ... [2022-11-02 20:13:23,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:23" (1/1) ... [2022-11-02 20:13:23,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:23" (1/1) ... [2022-11-02 20:13:23,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:23" (1/1) ... [2022-11-02 20:13:23,755 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:23" (1/1) ... [2022-11-02 20:13:23,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:23" (1/1) ... [2022-11-02 20:13:23,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:13:23,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:13:23,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:13:23,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:13:23,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:23" (1/1) ... [2022-11-02 20:13:23,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:13:23,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:23,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:13:23,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:13:23,872 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2022-11-02 20:13:23,872 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2022-11-02 20:13:23,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:13:23,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:13:23,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:13:23,874 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-02 20:13:23,874 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-02 20:13:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_linked_list_is_allocated [2022-11-02 20:13:23,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_linked_list_is_allocated [2022-11-02 20:13:23,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:13:23,878 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-02 20:13:23,878 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-02 20:13:23,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:13:23,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:13:23,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:13:23,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:13:23,879 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-02 20:13:23,880 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-02 20:13:23,880 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:13:23,880 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:13:23,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:13:23,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:13:23,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:13:23,881 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-02 20:13:23,881 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-02 20:13:23,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:13:24,276 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:13:24,278 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:13:24,811 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:13:24,821 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:13:24,821 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:13:24,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:13:24 BoogieIcfgContainer [2022-11-02 20:13:24,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:13:24,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:13:24,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:13:24,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:13:24,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:13:20" (1/3) ... [2022-11-02 20:13:24,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f778958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:13:24, skipping insertion in model container [2022-11-02 20:13:24,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:23" (2/3) ... [2022-11-02 20:13:24,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f778958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:13:24, skipping insertion in model container [2022-11-02 20:13:24,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:13:24" (3/3) ... [2022-11-02 20:13:24,837 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2022-11-02 20:13:24,865 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:13:24,866 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:13:24,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:13:24,965 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;@4d057bbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:13:24,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:13:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 70 states have (on average 1.3) internal successors, (91), 73 states have internal predecessors, (91), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-02 20:13:24,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-02 20:13:24,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:24,988 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:24,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2022444143, now seen corresponding path program 1 times [2022-11-02 20:13:25,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:25,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916742504] [2022-11-02 20:13:25,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:25,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:25,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:13:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:25,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:25,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:25,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:25,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:25,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:25,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:26,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 20:13:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:26,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-02 20:13:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:26,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 20:13:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:26,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-02 20:13:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:26,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:26,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:13:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-02 20:13:26,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:26,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916742504] [2022-11-02 20:13:26,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916742504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:26,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:13:26,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:13:26,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332908626] [2022-11-02 20:13:26,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:26,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:13:26,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:26,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:13:26,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:13:26,214 INFO L87 Difference]: Start difference. First operand has 114 states, 70 states have (on average 1.3) internal successors, (91), 73 states have internal predecessors, (91), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-02 20:13:26,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:26,764 INFO L93 Difference]: Finished difference Result 225 states and 346 transitions. [2022-11-02 20:13:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:13:26,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2022-11-02 20:13:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:26,792 INFO L225 Difference]: With dead ends: 225 [2022-11-02 20:13:26,793 INFO L226 Difference]: Without dead ends: 107 [2022-11-02 20:13:26,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:13:26,809 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 49 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:26,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 162 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:13:26,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-02 20:13:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-11-02 20:13:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 64 states have (on average 1.265625) internal successors, (81), 68 states have internal predecessors, (81), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-02 20:13:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2022-11-02 20:13:26,876 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 101 [2022-11-02 20:13:26,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:26,877 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2022-11-02 20:13:26,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-02 20:13:26,877 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2022-11-02 20:13:26,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-02 20:13:26,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:26,882 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:26,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:13:26,882 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:26,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:26,883 INFO L85 PathProgramCache]: Analyzing trace with hash 661877963, now seen corresponding path program 1 times [2022-11-02 20:13:26,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:26,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12795076] [2022-11-02 20:13:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:26,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:13:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 20:13:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-02 20:13:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 20:13:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-02 20:13:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:13:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-02 20:13:28,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:28,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12795076] [2022-11-02 20:13:28,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12795076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:28,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404967275] [2022-11-02 20:13:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:28,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:28,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:28,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:28,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:13:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:28,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:13:28,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-02 20:13:28,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:28,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404967275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:28,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:13:28,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-11-02 20:13:28,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163397558] [2022-11-02 20:13:28,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:28,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:13:28,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:28,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:13:28,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:13:28,628 INFO L87 Difference]: Start difference. First operand 107 states and 147 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-02 20:13:28,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:28,718 INFO L93 Difference]: Finished difference Result 207 states and 299 transitions. [2022-11-02 20:13:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:13:28,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2022-11-02 20:13:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:28,722 INFO L225 Difference]: With dead ends: 207 [2022-11-02 20:13:28,722 INFO L226 Difference]: Without dead ends: 119 [2022-11-02 20:13:28,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:13:28,725 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 21 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:28,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 431 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:13:28,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-02 20:13:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-11-02 20:13:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 70 states have internal predecessors, (83), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-02 20:13:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 149 transitions. [2022-11-02 20:13:28,746 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 149 transitions. Word has length 101 [2022-11-02 20:13:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:28,748 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 149 transitions. [2022-11-02 20:13:28,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-02 20:13:28,748 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 149 transitions. [2022-11-02 20:13:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-02 20:13:28,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:28,751 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:28,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:28,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:28,976 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:28,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1370013829, now seen corresponding path program 1 times [2022-11-02 20:13:28,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:28,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503105455] [2022-11-02 20:13:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:28,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:29,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:13:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:29,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:29,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:29,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:29,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:29,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:29,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:29,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 20:13:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:29,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-02 20:13:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:29,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 20:13:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:29,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-02 20:13:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:29,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:29,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:13:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-02 20:13:29,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:29,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503105455] [2022-11-02 20:13:29,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503105455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:29,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637974286] [2022-11-02 20:13:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:29,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:29,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:29,926 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:29,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:13:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:30,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:13:30,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-02 20:13:30,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:30,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637974286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:30,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:13:30,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-02 20:13:30,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190776069] [2022-11-02 20:13:30,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:30,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:13:30,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:30,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:13:30,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:13:30,589 INFO L87 Difference]: Start difference. First operand 109 states and 149 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-02 20:13:30,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:30,660 INFO L93 Difference]: Finished difference Result 207 states and 297 transitions. [2022-11-02 20:13:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:13:30,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2022-11-02 20:13:30,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:30,669 INFO L225 Difference]: With dead ends: 207 [2022-11-02 20:13:30,671 INFO L226 Difference]: Without dead ends: 117 [2022-11-02 20:13:30,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:13:30,675 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 12 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:30,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 428 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:13:30,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-02 20:13:30,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 111. [2022-11-02 20:13:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 68 states have (on average 1.25) internal successors, (85), 72 states have internal predecessors, (85), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-02 20:13:30,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 151 transitions. [2022-11-02 20:13:30,692 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 151 transitions. Word has length 101 [2022-11-02 20:13:30,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:30,693 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 151 transitions. [2022-11-02 20:13:30,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-02 20:13:30,693 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 151 transitions. [2022-11-02 20:13:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-02 20:13:30,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:30,696 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:30,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:30,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:30,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:30,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:30,920 INFO L85 PathProgramCache]: Analyzing trace with hash 38908607, now seen corresponding path program 1 times [2022-11-02 20:13:30,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:30,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704304819] [2022-11-02 20:13:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:30,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:13:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 20:13:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-02 20:13:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 20:13:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-02 20:13:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:13:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-02 20:13:31,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:31,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704304819] [2022-11-02 20:13:31,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704304819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:31,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83646712] [2022-11-02 20:13:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:31,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:31,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:31,669 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:31,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:13:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:32,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:13:32,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:13:32,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:32,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83646712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:32,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:13:32,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-02 20:13:32,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49602412] [2022-11-02 20:13:32,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:32,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:13:32,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:32,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:13:32,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:13:32,276 INFO L87 Difference]: Start difference. First operand 111 states and 151 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-02 20:13:32,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:32,336 INFO L93 Difference]: Finished difference Result 207 states and 295 transitions. [2022-11-02 20:13:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:13:32,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2022-11-02 20:13:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:32,341 INFO L225 Difference]: With dead ends: 207 [2022-11-02 20:13:32,342 INFO L226 Difference]: Without dead ends: 115 [2022-11-02 20:13:32,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:13:32,347 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 3 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:32,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 427 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:13:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-02 20:13:32,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-11-02 20:13:32,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 75 states have internal predecessors, (88), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-02 20:13:32,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 154 transitions. [2022-11-02 20:13:32,381 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 154 transitions. Word has length 101 [2022-11-02 20:13:32,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:32,384 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 154 transitions. [2022-11-02 20:13:32,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-02 20:13:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 154 transitions. [2022-11-02 20:13:32,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-02 20:13:32,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:32,392 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:32,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:32,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:32,620 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:32,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:32,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1759122567, now seen corresponding path program 1 times [2022-11-02 20:13:32,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:32,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609931401] [2022-11-02 20:13:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:32,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:13:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 20:13:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-02 20:13:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 20:13:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-02 20:13:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:13:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-02 20:13:33,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:33,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609931401] [2022-11-02 20:13:33,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609931401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:33,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785290502] [2022-11-02 20:13:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:33,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:33,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:33,252 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:33,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:13:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:13:33,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-02 20:13:34,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:34,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785290502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:34,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:13:34,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-02 20:13:34,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11437939] [2022-11-02 20:13:34,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:34,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:13:34,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:34,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:13:34,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:13:34,132 INFO L87 Difference]: Start difference. First operand 114 states and 154 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-02 20:13:34,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:34,534 INFO L93 Difference]: Finished difference Result 216 states and 298 transitions. [2022-11-02 20:13:34,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:13:34,535 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 101 [2022-11-02 20:13:34,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:34,538 INFO L225 Difference]: With dead ends: 216 [2022-11-02 20:13:34,538 INFO L226 Difference]: Without dead ends: 121 [2022-11-02 20:13:34,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:13:34,540 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 176 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:34,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 396 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:13:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-02 20:13:34,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-02 20:13:34,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 82 states have internal predecessors, (94), 34 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (36), 32 states have call predecessors, (36), 32 states have call successors, (36) [2022-11-02 20:13:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 164 transitions. [2022-11-02 20:13:34,559 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 164 transitions. Word has length 101 [2022-11-02 20:13:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:34,559 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 164 transitions. [2022-11-02 20:13:34,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-02 20:13:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 164 transitions. [2022-11-02 20:13:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-02 20:13:34,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:34,562 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:34,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:34,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:34,775 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:34,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1159297143, now seen corresponding path program 1 times [2022-11-02 20:13:34,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:34,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038965210] [2022-11-02 20:13:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:34,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:13:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 20:13:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-02 20:13:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 20:13:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-02 20:13:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:13:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-02 20:13:35,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:35,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038965210] [2022-11-02 20:13:35,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038965210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:35,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623817987] [2022-11-02 20:13:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:35,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:35,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:35,625 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:35,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:13:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:36,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:13:36,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 20:13:36,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:36,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623817987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:36,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:13:36,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-02 20:13:36,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524858166] [2022-11-02 20:13:36,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:36,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:13:36,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:36,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:13:36,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:13:36,523 INFO L87 Difference]: Start difference. First operand 121 states and 164 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-02 20:13:36,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:36,871 INFO L93 Difference]: Finished difference Result 220 states and 299 transitions. [2022-11-02 20:13:36,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:13:36,872 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 101 [2022-11-02 20:13:36,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:36,873 INFO L225 Difference]: With dead ends: 220 [2022-11-02 20:13:36,873 INFO L226 Difference]: Without dead ends: 121 [2022-11-02 20:13:36,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:13:36,875 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 175 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:36,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 397 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:13:36,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-02 20:13:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-02 20:13:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 82 states have internal predecessors, (94), 34 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-11-02 20:13:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 161 transitions. [2022-11-02 20:13:36,891 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 161 transitions. Word has length 101 [2022-11-02 20:13:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:36,892 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 161 transitions. [2022-11-02 20:13:36,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-02 20:13:36,892 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 161 transitions. [2022-11-02 20:13:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-02 20:13:36,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:36,894 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:36,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:37,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:13:37,120 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:37,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:37,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1251856495, now seen corresponding path program 1 times [2022-11-02 20:13:37,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:37,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29083099] [2022-11-02 20:13:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:37,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:13:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 20:13:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-02 20:13:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 20:13:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-02 20:13:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:13:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-02 20:13:37,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:37,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29083099] [2022-11-02 20:13:37,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29083099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:37,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833404273] [2022-11-02 20:13:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:37,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:37,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:37,970 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:37,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:13:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:38,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 20:13:38,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 20:13:38,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:38,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833404273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:38,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:13:38,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 12 [2022-11-02 20:13:38,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528115868] [2022-11-02 20:13:38,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:38,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:13:38,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:38,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:13:38,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:13:38,939 INFO L87 Difference]: Start difference. First operand 121 states and 161 transitions. Second operand has 9 states, 7 states have (on average 7.142857142857143) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-02 20:13:39,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:39,532 INFO L93 Difference]: Finished difference Result 225 states and 307 transitions. [2022-11-02 20:13:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:13:39,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.142857142857143) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 101 [2022-11-02 20:13:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:39,534 INFO L225 Difference]: With dead ends: 225 [2022-11-02 20:13:39,534 INFO L226 Difference]: Without dead ends: 123 [2022-11-02 20:13:39,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:13:39,536 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 158 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:39,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 607 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:13:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-02 20:13:39,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-11-02 20:13:39,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 84 states have internal predecessors, (95), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (39), 32 states have call predecessors, (39), 32 states have call successors, (39) [2022-11-02 20:13:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 168 transitions. [2022-11-02 20:13:39,552 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 168 transitions. Word has length 101 [2022-11-02 20:13:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:39,553 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 168 transitions. [2022-11-02 20:13:39,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.142857142857143) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-02 20:13:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 168 transitions. [2022-11-02 20:13:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-02 20:13:39,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:39,556 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:39,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:39,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:13:39,774 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:39,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:39,774 INFO L85 PathProgramCache]: Analyzing trace with hash -657271923, now seen corresponding path program 1 times [2022-11-02 20:13:39,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:39,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774707492] [2022-11-02 20:13:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:39,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:40,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:13:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:40,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:40,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:40,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:40,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:40,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:40,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:40,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-02 20:13:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:40,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-02 20:13:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:40,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-02 20:13:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:40,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:13:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:40,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:40,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-02 20:13:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-02 20:13:40,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:40,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774707492] [2022-11-02 20:13:40,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774707492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:40,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221813702] [2022-11-02 20:13:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:40,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:40,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:40,394 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:40,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:13:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:41,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:13:41,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-02 20:13:41,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:41,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221813702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:41,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:13:41,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-02 20:13:41,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332949955] [2022-11-02 20:13:41,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:41,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:13:41,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:41,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:13:41,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:13:41,430 INFO L87 Difference]: Start difference. First operand 123 states and 168 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-02 20:13:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:42,007 INFO L93 Difference]: Finished difference Result 230 states and 322 transitions. [2022-11-02 20:13:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:13:42,007 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 103 [2022-11-02 20:13:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:42,009 INFO L225 Difference]: With dead ends: 230 [2022-11-02 20:13:42,009 INFO L226 Difference]: Without dead ends: 126 [2022-11-02 20:13:42,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:13:42,011 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 184 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:42,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 536 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:13:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-02 20:13:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-02 20:13:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 80 states have (on average 1.2125) internal successors, (97), 87 states have internal predecessors, (97), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2022-11-02 20:13:42,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 174 transitions. [2022-11-02 20:13:42,028 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 174 transitions. Word has length 103 [2022-11-02 20:13:42,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:42,029 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 174 transitions. [2022-11-02 20:13:42,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-02 20:13:42,029 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 174 transitions. [2022-11-02 20:13:42,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-02 20:13:42,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:42,031 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:42,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:42,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:42,252 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:42,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:42,252 INFO L85 PathProgramCache]: Analyzing trace with hash 76379770, now seen corresponding path program 1 times [2022-11-02 20:13:42,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:42,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752889894] [2022-11-02 20:13:42,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:42,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:42,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:13:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:42,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:42,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:42,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:42,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:42,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:42,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:42,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:13:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:42,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:13:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:42,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:13:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:42,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-02 20:13:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:43,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:43,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-02 20:13:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-02 20:13:43,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:43,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752889894] [2022-11-02 20:13:43,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752889894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:43,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305052326] [2022-11-02 20:13:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:43,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:43,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:43,037 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:43,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:13:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:43,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:13:43,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-02 20:13:44,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:44,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305052326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:44,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:13:44,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-11-02 20:13:44,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538859489] [2022-11-02 20:13:44,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:44,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:13:44,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:44,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:13:44,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:13:44,076 INFO L87 Difference]: Start difference. First operand 126 states and 174 transitions. Second operand has 9 states, 8 states have (on average 6.375) internal successors, (51), 9 states have internal predecessors, (51), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-02 20:13:44,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:44,766 INFO L93 Difference]: Finished difference Result 245 states and 353 transitions. [2022-11-02 20:13:44,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:13:44,767 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 9 states have internal predecessors, (51), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 105 [2022-11-02 20:13:44,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:44,768 INFO L225 Difference]: With dead ends: 245 [2022-11-02 20:13:44,769 INFO L226 Difference]: Without dead ends: 138 [2022-11-02 20:13:44,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:13:44,771 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 221 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:44,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 616 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:13:44,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-02 20:13:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 128. [2022-11-02 20:13:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 89 states have internal predecessors, (100), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2022-11-02 20:13:44,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 177 transitions. [2022-11-02 20:13:44,797 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 177 transitions. Word has length 105 [2022-11-02 20:13:44,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:44,797 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 177 transitions. [2022-11-02 20:13:44,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 9 states have internal predecessors, (51), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-02 20:13:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 177 transitions. [2022-11-02 20:13:44,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-02 20:13:44,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:44,802 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:44,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:45,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:45,015 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:45,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1876687072, now seen corresponding path program 1 times [2022-11-02 20:13:45,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:45,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205698468] [2022-11-02 20:13:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:45,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:45,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:13:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:45,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:45,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:45,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:45,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:45,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:45,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:45,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-02 20:13:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:45,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 20:13:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:45,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-02 20:13:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:45,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-02 20:13:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:45,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:45,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-02 20:13:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-02 20:13:45,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:45,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205698468] [2022-11-02 20:13:45,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205698468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:45,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926711314] [2022-11-02 20:13:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:45,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:45,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:45,784 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:45,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:13:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:46,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:13:46,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-02 20:13:46,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:46,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926711314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:46,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:13:46,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-02 20:13:46,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055954743] [2022-11-02 20:13:46,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:46,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:13:46,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:46,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:13:46,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:13:46,701 INFO L87 Difference]: Start difference. First operand 128 states and 177 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-02 20:13:46,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:46,733 INFO L93 Difference]: Finished difference Result 246 states and 361 transitions. [2022-11-02 20:13:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:13:46,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2022-11-02 20:13:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:46,736 INFO L225 Difference]: With dead ends: 246 [2022-11-02 20:13:46,736 INFO L226 Difference]: Without dead ends: 137 [2022-11-02 20:13:46,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:13:46,738 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 6 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:46,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 296 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:13:46,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-02 20:13:46,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 129. [2022-11-02 20:13:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.216867469879518) internal successors, (101), 90 states have internal predecessors, (101), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2022-11-02 20:13:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 178 transitions. [2022-11-02 20:13:46,756 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 178 transitions. Word has length 106 [2022-11-02 20:13:46,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:46,756 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 178 transitions. [2022-11-02 20:13:46,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-02 20:13:46,757 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 178 transitions. [2022-11-02 20:13:46,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-02 20:13:46,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:46,759 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:46,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:46,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:13:46,983 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:46,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1115937726, now seen corresponding path program 1 times [2022-11-02 20:13:46,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:46,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049954707] [2022-11-02 20:13:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:46,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:13:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:13:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-02 20:13:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-02 20:13:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-02 20:13:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-02 20:13:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-02 20:13:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-02 20:13:47,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:47,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049954707] [2022-11-02 20:13:47,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049954707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:47,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671269508] [2022-11-02 20:13:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:47,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:47,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:47,785 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:47,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:13:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:48,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:13:48,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 20:13:48,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:48,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671269508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:48,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:13:48,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 13 [2022-11-02 20:13:48,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182656392] [2022-11-02 20:13:48,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:48,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:13:48,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:48,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:13:48,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:13:48,985 INFO L87 Difference]: Start difference. First operand 129 states and 178 transitions. Second operand has 10 states, 8 states have (on average 7.625) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-02 20:13:49,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:49,751 INFO L93 Difference]: Finished difference Result 245 states and 348 transitions. [2022-11-02 20:13:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:13:49,752 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 7.625) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 114 [2022-11-02 20:13:49,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:49,754 INFO L225 Difference]: With dead ends: 245 [2022-11-02 20:13:49,754 INFO L226 Difference]: Without dead ends: 135 [2022-11-02 20:13:49,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:13:49,756 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 161 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:49,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 713 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:13:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-02 20:13:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-11-02 20:13:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 91 states have internal predecessors, (102), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2022-11-02 20:13:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 179 transitions. [2022-11-02 20:13:49,772 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 179 transitions. Word has length 114 [2022-11-02 20:13:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:49,773 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 179 transitions. [2022-11-02 20:13:49,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 7.625) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-02 20:13:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 179 transitions. [2022-11-02 20:13:49,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-02 20:13:49,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:49,775 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:49,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:49,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:49,997 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:49,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:49,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1680174575, now seen corresponding path program 1 times [2022-11-02 20:13:49,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:49,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762943026] [2022-11-02 20:13:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:49,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:50,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:13:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:50,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:50,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:50,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:50,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:50,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:51,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:51,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:13:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:51,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-02 20:13:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:51,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-02 20:13:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:51,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-02 20:13:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:51,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-02 20:13:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:51,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:51,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-02 20:13:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-02 20:13:51,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:51,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762943026] [2022-11-02 20:13:51,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762943026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:51,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897884540] [2022-11-02 20:13:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:51,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:51,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:51,365 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:51,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:13:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:52,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:13:52,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:13:52,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:52,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897884540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:52,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:13:52,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 18 [2022-11-02 20:13:52,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305378806] [2022-11-02 20:13:52,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:52,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:13:52,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:52,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:13:52,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:13:52,750 INFO L87 Difference]: Start difference. First operand 130 states and 179 transitions. Second operand has 11 states, 9 states have (on average 7.0) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-02 20:13:53,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:53,692 INFO L93 Difference]: Finished difference Result 250 states and 358 transitions. [2022-11-02 20:13:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:13:53,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 7.0) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 116 [2022-11-02 20:13:53,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:53,695 INFO L225 Difference]: With dead ends: 250 [2022-11-02 20:13:53,695 INFO L226 Difference]: Without dead ends: 139 [2022-11-02 20:13:53,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:13:53,698 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 165 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:53,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 899 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:13:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-02 20:13:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2022-11-02 20:13:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 92 states have internal predecessors, (103), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2022-11-02 20:13:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 180 transitions. [2022-11-02 20:13:53,714 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 180 transitions. Word has length 116 [2022-11-02 20:13:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:53,715 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 180 transitions. [2022-11-02 20:13:53,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 7.0) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-02 20:13:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 180 transitions. [2022-11-02 20:13:53,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-02 20:13:53,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:53,718 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:53,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:53,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:13:53,943 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:53,944 INFO L85 PathProgramCache]: Analyzing trace with hash 54718475, now seen corresponding path program 1 times [2022-11-02 20:13:53,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:53,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049088387] [2022-11-02 20:13:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:53,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:13:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:13:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:13:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:13:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:13:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:13:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-02 20:13:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-02 20:13:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:13:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-02 20:13:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-02 20:13:54,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:54,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049088387] [2022-11-02 20:13:54,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049088387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:54,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891871804] [2022-11-02 20:13:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:54,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:54,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:54,649 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:54,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:13:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:55,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 20:13:55,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:56,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:13:56,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-02 20:13:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 39 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:13:56,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:57,001 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:13:57,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 29 [2022-11-02 20:13:57,018 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:13:57,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 27 [2022-11-02 20:13:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-02 20:13:57,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891871804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:13:57,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:13:57,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 9] total 20 [2022-11-02 20:13:57,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178420811] [2022-11-02 20:13:57,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:57,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:13:57,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:13:57,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:13:57,215 INFO L87 Difference]: Start difference. First operand 131 states and 180 transitions. Second operand has 20 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 10 states have call successors, (28), 4 states have call predecessors, (28), 6 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2022-11-02 20:14:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:03,312 INFO L93 Difference]: Finished difference Result 442 states and 786 transitions. [2022-11-02 20:14:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:14:03,313 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 10 states have call successors, (28), 4 states have call predecessors, (28), 6 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) Word has length 117 [2022-11-02 20:14:03,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:03,317 INFO L225 Difference]: With dead ends: 442 [2022-11-02 20:14:03,317 INFO L226 Difference]: Without dead ends: 316 [2022-11-02 20:14:03,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 253 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=229, Invalid=1577, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:14:03,320 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 278 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 3758 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 2089 SdHoareTripleChecker+Invalid, 4846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 3758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 581 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:03,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 2089 Invalid, 4846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 3758 Invalid, 0 Unknown, 581 Unchecked, 5.1s Time] [2022-11-02 20:14:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-02 20:14:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 170. [2022-11-02 20:14:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 123 states have internal predecessors, (136), 40 states have call successors, (40), 10 states have call predecessors, (40), 16 states have return successors, (69), 39 states have call predecessors, (69), 38 states have call successors, (69) [2022-11-02 20:14:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 245 transitions. [2022-11-02 20:14:03,368 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 245 transitions. Word has length 117 [2022-11-02 20:14:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:03,369 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 245 transitions. [2022-11-02 20:14:03,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 10 states have call successors, (28), 4 states have call predecessors, (28), 6 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2022-11-02 20:14:03,370 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 245 transitions. [2022-11-02 20:14:03,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-02 20:14:03,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:03,372 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:03,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:03,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:14:03,599 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:03,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:03,600 INFO L85 PathProgramCache]: Analyzing trace with hash -577288815, now seen corresponding path program 1 times [2022-11-02 20:14:03,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:03,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347255379] [2022-11-02 20:14:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:03,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:03,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:14:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:03,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:03,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:03,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:14:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:03,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:03,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:03,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:14:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:03,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:03,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:14:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:03,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:14:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:04,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:14:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:04,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-02 20:14:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:04,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:04,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-02 20:14:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:04,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 20:14:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-02 20:14:04,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:04,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347255379] [2022-11-02 20:14:04,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347255379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:04,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41489842] [2022-11-02 20:14:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:04,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:04,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:04,087 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:04,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:14:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:05,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:14:05,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-02 20:14:05,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:14:05,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41489842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:05,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:14:05,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-02 20:14:05,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815054560] [2022-11-02 20:14:05,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:05,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:14:05,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:05,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:14:05,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:14:05,333 INFO L87 Difference]: Start difference. First operand 170 states and 245 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:14:05,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:05,870 INFO L93 Difference]: Finished difference Result 302 states and 435 transitions. [2022-11-02 20:14:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:14:05,870 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 126 [2022-11-02 20:14:05,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:05,873 INFO L225 Difference]: With dead ends: 302 [2022-11-02 20:14:05,873 INFO L226 Difference]: Without dead ends: 167 [2022-11-02 20:14:05,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:14:05,876 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 183 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:05,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 539 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:14:05,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-02 20:14:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2022-11-02 20:14:05,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 110 states have (on average 1.2) internal successors, (132), 118 states have internal predecessors, (132), 40 states have call successors, (40), 10 states have call predecessors, (40), 14 states have return successors, (64), 39 states have call predecessors, (64), 38 states have call successors, (64) [2022-11-02 20:14:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 236 transitions. [2022-11-02 20:14:05,912 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 236 transitions. Word has length 126 [2022-11-02 20:14:05,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:05,913 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 236 transitions. [2022-11-02 20:14:05,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:14:05,914 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 236 transitions. [2022-11-02 20:14:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-02 20:14:05,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:05,917 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:14:05,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:06,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:14:06,131 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:06,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:06,132 INFO L85 PathProgramCache]: Analyzing trace with hash -692231420, now seen corresponding path program 1 times [2022-11-02 20:14:06,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:06,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986667086] [2022-11-02 20:14:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:06,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:14:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:14:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:14:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:14:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:14:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-02 20:14:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-02 20:14:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-02 20:14:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-02 20:14:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-02 20:14:06,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:06,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986667086] [2022-11-02 20:14:06,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986667086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:06,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318858349] [2022-11-02 20:14:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:06,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:06,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:06,671 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:06,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:14:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:07,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:14:07,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-02 20:14:07,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:14:07,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318858349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:07,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:14:07,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2022-11-02 20:14:07,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750338092] [2022-11-02 20:14:07,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:07,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:14:07,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:07,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:14:07,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:14:07,706 INFO L87 Difference]: Start difference. First operand 165 states and 236 transitions. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:14:08,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:08,376 INFO L93 Difference]: Finished difference Result 300 states and 433 transitions. [2022-11-02 20:14:08,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:14:08,377 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 128 [2022-11-02 20:14:08,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:08,379 INFO L225 Difference]: With dead ends: 300 [2022-11-02 20:14:08,379 INFO L226 Difference]: Without dead ends: 170 [2022-11-02 20:14:08,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:14:08,381 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 213 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:08,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 621 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:14:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-02 20:14:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 162. [2022-11-02 20:14:08,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.2037037037037037) internal successors, (130), 115 states have internal predecessors, (130), 40 states have call successors, (40), 10 states have call predecessors, (40), 13 states have return successors, (59), 39 states have call predecessors, (59), 38 states have call successors, (59) [2022-11-02 20:14:08,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 229 transitions. [2022-11-02 20:14:08,402 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 229 transitions. Word has length 128 [2022-11-02 20:14:08,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:08,402 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 229 transitions. [2022-11-02 20:14:08,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:14:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 229 transitions. [2022-11-02 20:14:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-02 20:14:08,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:08,405 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:14:08,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:08,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:14:08,619 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:08,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:08,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1728472669, now seen corresponding path program 1 times [2022-11-02 20:14:08,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:08,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096783220] [2022-11-02 20:14:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:08,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:08,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:14:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:08,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:08,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:08,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:14:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:08,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:08,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:08,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:14:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:09,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:09,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:14:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:09,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 20:14:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:09,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-02 20:14:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:09,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:09,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-02 20:14:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:09,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-02 20:14:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:09,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:09,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-02 20:14:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:09,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-02 20:14:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-02 20:14:09,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:09,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096783220] [2022-11-02 20:14:09,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096783220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:09,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:09,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:14:09,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329844924] [2022-11-02 20:14:09,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:09,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:14:09,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:09,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:14:09,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:14:09,132 INFO L87 Difference]: Start difference. First operand 162 states and 229 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:14:09,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:09,974 INFO L93 Difference]: Finished difference Result 288 states and 413 transitions. [2022-11-02 20:14:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:14:09,975 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 148 [2022-11-02 20:14:09,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:09,977 INFO L225 Difference]: With dead ends: 288 [2022-11-02 20:14:09,977 INFO L226 Difference]: Without dead ends: 175 [2022-11-02 20:14:09,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:14:09,978 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 109 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:09,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 393 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:14:09,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-02 20:14:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-11-02 20:14:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 122 states have internal predecessors, (136), 45 states have call successors, (45), 11 states have call predecessors, (45), 15 states have return successors, (69), 44 states have call predecessors, (69), 43 states have call successors, (69) [2022-11-02 20:14:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 250 transitions. [2022-11-02 20:14:10,003 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 250 transitions. Word has length 148 [2022-11-02 20:14:10,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:10,004 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 250 transitions. [2022-11-02 20:14:10,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:14:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 250 transitions. [2022-11-02 20:14:10,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-02 20:14:10,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:10,006 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:14:10,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 20:14:10,007 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:10,007 INFO L85 PathProgramCache]: Analyzing trace with hash 535862326, now seen corresponding path program 1 times [2022-11-02 20:14:10,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:10,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581446136] [2022-11-02 20:14:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:10,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:14:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:14:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:14:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:14:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:14:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-02 20:14:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-02 20:14:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-02 20:14:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-02 20:14:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-02 20:14:10,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:10,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581446136] [2022-11-02 20:14:10,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581446136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:10,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478709385] [2022-11-02 20:14:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:10,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:10,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:10,528 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:10,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:14:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:11,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:14:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:11,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:11,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:11,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:11,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-02 20:14:11,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:11,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:11,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:11,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-02 20:14:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-02 20:14:11,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:14:11,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478709385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:11,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:14:11,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2022-11-02 20:14:11,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090030254] [2022-11-02 20:14:11,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:11,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:14:11,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:11,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:14:11,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:14:11,909 INFO L87 Difference]: Start difference. First operand 175 states and 250 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-02 20:14:12,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:12,171 INFO L93 Difference]: Finished difference Result 324 states and 453 transitions. [2022-11-02 20:14:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:14:12,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 137 [2022-11-02 20:14:12,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:12,173 INFO L225 Difference]: With dead ends: 324 [2022-11-02 20:14:12,174 INFO L226 Difference]: Without dead ends: 191 [2022-11-02 20:14:12,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:14:12,176 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 55 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:12,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 780 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 50 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-11-02 20:14:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-02 20:14:12,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-11-02 20:14:12,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 129 states have (on average 1.193798449612403) internal successors, (154), 137 states have internal predecessors, (154), 45 states have call successors, (45), 12 states have call predecessors, (45), 16 states have return successors, (69), 44 states have call predecessors, (69), 43 states have call successors, (69) [2022-11-02 20:14:12,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 268 transitions. [2022-11-02 20:14:12,200 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 268 transitions. Word has length 137 [2022-11-02 20:14:12,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:12,201 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 268 transitions. [2022-11-02 20:14:12,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-02 20:14:12,201 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 268 transitions. [2022-11-02 20:14:12,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-02 20:14:12,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:12,203 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:12,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:12,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:12,423 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:12,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:12,424 INFO L85 PathProgramCache]: Analyzing trace with hash -582493847, now seen corresponding path program 1 times [2022-11-02 20:14:12,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:12,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896034709] [2022-11-02 20:14:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:12,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:14:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:14:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:14:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:14:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 20:14:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-02 20:14:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-02 20:14:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-02 20:14:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-02 20:14:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-02 20:14:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-02 20:14:12,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:12,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896034709] [2022-11-02 20:14:12,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896034709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:12,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327875762] [2022-11-02 20:14:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:12,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:12,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:12,995 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:13,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:14:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:13,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:14:13,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 72 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-02 20:14:14,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-02 20:14:14,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327875762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:14,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:14,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 7] total 19 [2022-11-02 20:14:14,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14070603] [2022-11-02 20:14:14,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:14,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:14:14,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:14,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:14:14,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:14:14,308 INFO L87 Difference]: Start difference. First operand 191 states and 268 transitions. Second operand has 19 states, 16 states have (on average 5.4375) internal successors, (87), 14 states have internal predecessors, (87), 5 states have call successors, (23), 3 states have call predecessors, (23), 8 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2022-11-02 20:14:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:15,634 INFO L93 Difference]: Finished difference Result 353 states and 503 transitions. [2022-11-02 20:14:15,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:14:15,635 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 5.4375) internal successors, (87), 14 states have internal predecessors, (87), 5 states have call successors, (23), 3 states have call predecessors, (23), 8 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 148 [2022-11-02 20:14:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:15,638 INFO L225 Difference]: With dead ends: 353 [2022-11-02 20:14:15,638 INFO L226 Difference]: Without dead ends: 201 [2022-11-02 20:14:15,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:14:15,641 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 63 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:15,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 941 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:14:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-02 20:14:15,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 194. [2022-11-02 20:14:15,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 131 states have (on average 1.1908396946564885) internal successors, (156), 140 states have internal predecessors, (156), 45 states have call successors, (45), 12 states have call predecessors, (45), 17 states have return successors, (75), 44 states have call predecessors, (75), 43 states have call successors, (75) [2022-11-02 20:14:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 276 transitions. [2022-11-02 20:14:15,677 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 276 transitions. Word has length 148 [2022-11-02 20:14:15,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:15,678 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 276 transitions. [2022-11-02 20:14:15,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 5.4375) internal successors, (87), 14 states have internal predecessors, (87), 5 states have call successors, (23), 3 states have call predecessors, (23), 8 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2022-11-02 20:14:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 276 transitions. [2022-11-02 20:14:15,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-02 20:14:15,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:15,682 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:14:15,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:15,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:14:15,902 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:15,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:15,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1421909977, now seen corresponding path program 1 times [2022-11-02 20:14:15,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:15,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923432663] [2022-11-02 20:14:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:15,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:14:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:14:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:14:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:14:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:14:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-02 20:14:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-02 20:14:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-02 20:14:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-02 20:14:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-02 20:14:16,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:16,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923432663] [2022-11-02 20:14:16,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923432663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:16,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139530254] [2022-11-02 20:14:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:16,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:16,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:16,704 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:16,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:14:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:17,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 20:14:17,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:17,796 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:14:17,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-02 20:14:17,813 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:14:17,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-02 20:14:19,480 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_3| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_3| Int)) (not (= 0 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_3|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_3|)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_3| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_3|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_3|) 0)))) is different from true [2022-11-02 20:14:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-02 20:14:19,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-02 20:14:19,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139530254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:19,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:19,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 8] total 20 [2022-11-02 20:14:19,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555590090] [2022-11-02 20:14:19,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:19,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:14:19,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:19,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:14:19,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=295, Unknown=1, NotChecked=34, Total=380 [2022-11-02 20:14:19,907 INFO L87 Difference]: Start difference. First operand 194 states and 276 transitions. Second operand has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 7 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2022-11-02 20:14:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:28,464 INFO L93 Difference]: Finished difference Result 409 states and 638 transitions. [2022-11-02 20:14:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:14:28,465 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 7 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) Word has length 139 [2022-11-02 20:14:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:28,468 INFO L225 Difference]: With dead ends: 409 [2022-11-02 20:14:28,468 INFO L226 Difference]: Without dead ends: 250 [2022-11-02 20:14:28,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=219, Invalid=1040, Unknown=5, NotChecked=68, Total=1332 [2022-11-02 20:14:28,471 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 222 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1914 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:28,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 720 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1914 Invalid, 0 Unknown, 252 Unchecked, 2.6s Time] [2022-11-02 20:14:28,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-02 20:14:28,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 200. [2022-11-02 20:14:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 136 states have (on average 1.1838235294117647) internal successors, (161), 145 states have internal predecessors, (161), 45 states have call successors, (45), 13 states have call predecessors, (45), 18 states have return successors, (76), 44 states have call predecessors, (76), 43 states have call successors, (76) [2022-11-02 20:14:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 282 transitions. [2022-11-02 20:14:28,511 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 282 transitions. Word has length 139 [2022-11-02 20:14:28,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:28,512 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 282 transitions. [2022-11-02 20:14:28,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 7 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2022-11-02 20:14:28,512 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 282 transitions. [2022-11-02 20:14:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-02 20:14:28,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:28,514 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:14:28,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:28,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:28,739 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:28,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:28,740 INFO L85 PathProgramCache]: Analyzing trace with hash 806993753, now seen corresponding path program 1 times [2022-11-02 20:14:28,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:28,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147077236] [2022-11-02 20:14:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:28,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:14:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:14:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:14:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:14:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:14:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-02 20:14:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-02 20:14:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-02 20:14:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-02 20:14:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-02 20:14:30,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:30,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147077236] [2022-11-02 20:14:30,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147077236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:30,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:30,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-02 20:14:30,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888224462] [2022-11-02 20:14:30,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:30,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:14:30,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:30,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:14:30,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:14:30,554 INFO L87 Difference]: Start difference. First operand 200 states and 282 transitions. Second operand has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 7 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-02 20:14:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:32,167 INFO L93 Difference]: Finished difference Result 337 states and 478 transitions. [2022-11-02 20:14:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:14:32,168 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 7 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 140 [2022-11-02 20:14:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:32,170 INFO L225 Difference]: With dead ends: 337 [2022-11-02 20:14:32,170 INFO L226 Difference]: Without dead ends: 203 [2022-11-02 20:14:32,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:14:32,175 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 119 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:32,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 501 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:14:32,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-02 20:14:32,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 200. [2022-11-02 20:14:32,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 136 states have (on average 1.1764705882352942) internal successors, (160), 145 states have internal predecessors, (160), 45 states have call successors, (45), 13 states have call predecessors, (45), 18 states have return successors, (76), 44 states have call predecessors, (76), 43 states have call successors, (76) [2022-11-02 20:14:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 281 transitions. [2022-11-02 20:14:32,218 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 281 transitions. Word has length 140 [2022-11-02 20:14:32,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:32,219 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 281 transitions. [2022-11-02 20:14:32,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 7 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-02 20:14:32,219 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 281 transitions. [2022-11-02 20:14:32,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-02 20:14:32,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:32,221 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:14:32,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-02 20:14:32,221 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:32,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:32,222 INFO L85 PathProgramCache]: Analyzing trace with hash 413966743, now seen corresponding path program 1 times [2022-11-02 20:14:32,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:32,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540635467] [2022-11-02 20:14:32,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:32,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:14:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:14:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:14:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:14:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:14:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-02 20:14:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-02 20:14:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-02 20:14:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-02 20:14:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-02 20:14:33,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:33,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540635467] [2022-11-02 20:14:33,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540635467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:33,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:33,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:14:33,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764941204] [2022-11-02 20:14:33,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:33,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:14:33,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:33,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:14:33,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:14:33,714 INFO L87 Difference]: Start difference. First operand 200 states and 281 transitions. Second operand has 9 states, 7 states have (on average 8.285714285714286) internal successors, (58), 8 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-02 20:14:34,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:34,879 INFO L93 Difference]: Finished difference Result 342 states and 483 transitions. [2022-11-02 20:14:34,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:14:34,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.285714285714286) internal successors, (58), 8 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 140 [2022-11-02 20:14:34,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:34,882 INFO L225 Difference]: With dead ends: 342 [2022-11-02 20:14:34,882 INFO L226 Difference]: Without dead ends: 206 [2022-11-02 20:14:34,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:14:34,884 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 102 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:34,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 385 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:14:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-02 20:14:34,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-11-02 20:14:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 140 states have (on average 1.1642857142857144) internal successors, (163), 150 states have internal predecessors, (163), 45 states have call successors, (45), 13 states have call predecessors, (45), 19 states have return successors, (80), 44 states have call predecessors, (80), 43 states have call successors, (80) [2022-11-02 20:14:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 288 transitions. [2022-11-02 20:14:34,917 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 288 transitions. Word has length 140 [2022-11-02 20:14:34,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:34,918 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 288 transitions. [2022-11-02 20:14:34,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.285714285714286) internal successors, (58), 8 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-02 20:14:34,919 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 288 transitions. [2022-11-02 20:14:34,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-02 20:14:34,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:34,920 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:14:34,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-02 20:14:34,921 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:34,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:34,922 INFO L85 PathProgramCache]: Analyzing trace with hash -916367168, now seen corresponding path program 1 times [2022-11-02 20:14:34,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:34,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082277486] [2022-11-02 20:14:34,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:34,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:14:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:14:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:14:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:14:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 20:14:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-02 20:14:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 20:14:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-02 20:14:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-11-02 20:14:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-02 20:14:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-02 20:14:35,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:35,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082277486] [2022-11-02 20:14:35,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082277486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:35,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:35,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 20:14:35,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361718487] [2022-11-02 20:14:35,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:35,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:14:35,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:35,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:14:35,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:14:35,874 INFO L87 Difference]: Start difference. First operand 205 states and 288 transitions. Second operand has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-02 20:14:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:37,427 INFO L93 Difference]: Finished difference Result 344 states and 489 transitions. [2022-11-02 20:14:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:14:37,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 151 [2022-11-02 20:14:37,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:37,430 INFO L225 Difference]: With dead ends: 344 [2022-11-02 20:14:37,430 INFO L226 Difference]: Without dead ends: 201 [2022-11-02 20:14:37,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:14:37,432 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 133 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:37,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 479 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:14:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-02 20:14:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2022-11-02 20:14:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 134 states have (on average 1.164179104477612) internal successors, (156), 143 states have internal predecessors, (156), 45 states have call successors, (45), 13 states have call predecessors, (45), 18 states have return successors, (79), 44 states have call predecessors, (79), 43 states have call successors, (79) [2022-11-02 20:14:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 280 transitions. [2022-11-02 20:14:37,472 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 280 transitions. Word has length 151 [2022-11-02 20:14:37,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:37,473 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 280 transitions. [2022-11-02 20:14:37,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-02 20:14:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 280 transitions. [2022-11-02 20:14:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-02 20:14:37,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:37,475 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:14:37,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-02 20:14:37,476 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:37,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:37,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1841043424, now seen corresponding path program 1 times [2022-11-02 20:14:37,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:37,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786021865] [2022-11-02 20:14:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:37,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:14:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:14:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:14:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:14:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:14:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-02 20:14:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-02 20:14:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-02 20:14:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-02 20:14:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 33 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-02 20:14:38,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:38,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786021865] [2022-11-02 20:14:38,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786021865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:38,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649425151] [2022-11-02 20:14:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:38,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:38,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:38,484 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:38,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:14:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:39,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:14:39,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-02 20:14:39,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:14:39,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649425151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:39,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:14:39,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2022-11-02 20:14:39,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583233985] [2022-11-02 20:14:39,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:39,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:14:39,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:39,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:14:39,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:14:39,836 INFO L87 Difference]: Start difference. First operand 198 states and 280 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:14:40,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:40,437 INFO L93 Difference]: Finished difference Result 320 states and 447 transitions. [2022-11-02 20:14:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:14:40,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 141 [2022-11-02 20:14:40,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:40,439 INFO L225 Difference]: With dead ends: 320 [2022-11-02 20:14:40,440 INFO L226 Difference]: Without dead ends: 189 [2022-11-02 20:14:40,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:14:40,441 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 184 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:40,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 637 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:14:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-02 20:14:40,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-11-02 20:14:40,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 126 states have (on average 1.1666666666666667) internal successors, (147), 134 states have internal predecessors, (147), 45 states have call successors, (45), 13 states have call predecessors, (45), 17 states have return successors, (78), 44 states have call predecessors, (78), 43 states have call successors, (78) [2022-11-02 20:14:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 270 transitions. [2022-11-02 20:14:40,476 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 270 transitions. Word has length 141 [2022-11-02 20:14:40,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:40,477 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 270 transitions. [2022-11-02 20:14:40,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:14:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 270 transitions. [2022-11-02 20:14:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-02 20:14:40,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:40,479 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:14:40,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:40,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 20:14:40,693 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:40,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash -498598424, now seen corresponding path program 1 times [2022-11-02 20:14:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:40,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171641963] [2022-11-02 20:14:40,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:40,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:14:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:14:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:14:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:14:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:14:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-02 20:14:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-02 20:14:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-02 20:14:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-02 20:14:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-02 20:14:43,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:43,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171641963] [2022-11-02 20:14:43,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171641963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:43,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454499348] [2022-11-02 20:14:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:43,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:43,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:43,013 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:43,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:14:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:44,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:14:44,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:44,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:44,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:44,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:44,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-02 20:14:44,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:44,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:44,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:14:44,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-02 20:14:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-02 20:14:44,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:14:44,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454499348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:44,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:14:44,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 21 [2022-11-02 20:14:44,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46761887] [2022-11-02 20:14:44,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:44,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:14:44,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:44,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:14:44,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:14:44,848 INFO L87 Difference]: Start difference. First operand 189 states and 270 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-02 20:14:45,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:45,181 INFO L93 Difference]: Finished difference Result 319 states and 449 transitions. [2022-11-02 20:14:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:14:45,182 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 141 [2022-11-02 20:14:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:45,185 INFO L225 Difference]: With dead ends: 319 [2022-11-02 20:14:45,185 INFO L226 Difference]: Without dead ends: 202 [2022-11-02 20:14:45,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:14:45,188 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 54 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:45,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 986 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 71 Invalid, 0 Unknown, 110 Unchecked, 0.2s Time] [2022-11-02 20:14:45,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-02 20:14:45,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2022-11-02 20:14:45,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 134 states have (on average 1.171641791044776) internal successors, (157), 141 states have internal predecessors, (157), 45 states have call successors, (45), 14 states have call predecessors, (45), 17 states have return successors, (78), 44 states have call predecessors, (78), 43 states have call successors, (78) [2022-11-02 20:14:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 280 transitions. [2022-11-02 20:14:45,223 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 280 transitions. Word has length 141 [2022-11-02 20:14:45,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:45,226 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 280 transitions. [2022-11-02 20:14:45,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-02 20:14:45,226 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 280 transitions. [2022-11-02 20:14:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-02 20:14:45,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:45,228 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:14:45,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:45,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:45,448 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:45,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:45,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1307945050, now seen corresponding path program 1 times [2022-11-02 20:14:45,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:45,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374124778] [2022-11-02 20:14:45,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:45,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:46,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:14:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:46,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:46,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:46,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:14:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:46,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:46,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:46,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:14:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:46,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:46,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:14:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:47,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:14:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:47,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:47,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-02 20:14:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:47,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-02 20:14:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:47,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:47,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-02 20:14:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:47,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-02 20:14:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-02 20:14:47,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:47,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374124778] [2022-11-02 20:14:47,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374124778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:47,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417611122] [2022-11-02 20:14:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:47,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:47,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:47,576 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:47,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:14:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:48,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-02 20:14:48,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:48,829 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:14:48,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-02 20:14:48,848 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:14:48,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-02 20:14:49,924 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:14:49,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 53 treesize of output 29 [2022-11-02 20:14:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 91 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:14:49,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-02 20:14:51,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417611122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:51,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:51,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 11] total 36 [2022-11-02 20:14:51,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262970688] [2022-11-02 20:14:51,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:51,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 20:14:51,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:51,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 20:14:51,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1162, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:14:51,208 INFO L87 Difference]: Start difference. First operand 197 states and 280 transitions. Second operand has 36 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 31 states have internal predecessors, (134), 14 states have call successors, (36), 4 states have call predecessors, (36), 10 states have return successors, (34), 17 states have call predecessors, (34), 14 states have call successors, (34) [2022-11-02 20:14:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:14:58,279 INFO L93 Difference]: Finished difference Result 442 states and 697 transitions. [2022-11-02 20:14:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-02 20:14:58,279 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 31 states have internal predecessors, (134), 14 states have call successors, (36), 4 states have call predecessors, (36), 10 states have return successors, (34), 17 states have call predecessors, (34), 14 states have call successors, (34) Word has length 141 [2022-11-02 20:14:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:14:58,283 INFO L225 Difference]: With dead ends: 442 [2022-11-02 20:14:58,283 INFO L226 Difference]: Without dead ends: 313 [2022-11-02 20:14:58,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 293 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=342, Invalid=3440, Unknown=0, NotChecked=0, Total=3782 [2022-11-02 20:14:58,286 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 254 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 4508 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 2125 SdHoareTripleChecker+Invalid, 5219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 4508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 537 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:14:58,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 2125 Invalid, 5219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 4508 Invalid, 0 Unknown, 537 Unchecked, 5.5s Time] [2022-11-02 20:14:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-02 20:14:58,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 222. [2022-11-02 20:14:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 150 states have (on average 1.1533333333333333) internal successors, (173), 155 states have internal predecessors, (173), 50 states have call successors, (50), 18 states have call predecessors, (50), 21 states have return successors, (83), 51 states have call predecessors, (83), 48 states have call successors, (83) [2022-11-02 20:14:58,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 306 transitions. [2022-11-02 20:14:58,332 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 306 transitions. Word has length 141 [2022-11-02 20:14:58,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:14:58,333 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 306 transitions. [2022-11-02 20:14:58,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 31 states have internal predecessors, (134), 14 states have call successors, (36), 4 states have call predecessors, (36), 10 states have return successors, (34), 17 states have call predecessors, (34), 14 states have call successors, (34) [2022-11-02 20:14:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 306 transitions. [2022-11-02 20:14:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-02 20:14:58,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:14:58,335 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:58,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:58,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-02 20:14:58,559 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:14:58,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:58,560 INFO L85 PathProgramCache]: Analyzing trace with hash -47147753, now seen corresponding path program 1 times [2022-11-02 20:14:58,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:58,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52120700] [2022-11-02 20:14:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:58,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:58,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:14:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:58,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:58,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:58,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:14:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:58,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:58,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:14:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:58,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:14:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:58,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:58,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:14:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:58,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:14:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:59,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:14:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:59,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-02 20:14:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:59,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-02 20:14:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:59,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:14:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:59,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-02 20:14:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:59,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-02 20:14:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-02 20:14:59,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:59,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52120700] [2022-11-02 20:14:59,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52120700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:59,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:59,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 20:14:59,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116291950] [2022-11-02 20:14:59,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:59,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:14:59,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:59,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:14:59,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:14:59,173 INFO L87 Difference]: Start difference. First operand 222 states and 306 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:15:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:00,320 INFO L93 Difference]: Finished difference Result 358 states and 501 transitions. [2022-11-02 20:15:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:15:00,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 142 [2022-11-02 20:15:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:00,322 INFO L225 Difference]: With dead ends: 358 [2022-11-02 20:15:00,322 INFO L226 Difference]: Without dead ends: 222 [2022-11-02 20:15:00,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:15:00,323 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 123 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:00,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 445 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:15:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-02 20:15:00,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2022-11-02 20:15:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 150 states have (on average 1.1533333333333333) internal successors, (173), 155 states have internal predecessors, (173), 50 states have call successors, (50), 18 states have call predecessors, (50), 21 states have return successors, (82), 51 states have call predecessors, (82), 48 states have call successors, (82) [2022-11-02 20:15:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 305 transitions. [2022-11-02 20:15:00,363 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 305 transitions. Word has length 142 [2022-11-02 20:15:00,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:00,364 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 305 transitions. [2022-11-02 20:15:00,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:15:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 305 transitions. [2022-11-02 20:15:00,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-02 20:15:00,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:00,366 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:00,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-02 20:15:00,367 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:00,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:00,367 INFO L85 PathProgramCache]: Analyzing trace with hash -659395979, now seen corresponding path program 1 times [2022-11-02 20:15:00,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:00,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880485386] [2022-11-02 20:15:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:00,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:00,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:15:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:00,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:00,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:00,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:15:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:01,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:01,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:01,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:15:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:01,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:01,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:15:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:01,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:15:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:01,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:01,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:15:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:01,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-02 20:15:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:01,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-02 20:15:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:01,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:01,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-11-02 20:15:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:01,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-02 20:15:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-02 20:15:01,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:01,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880485386] [2022-11-02 20:15:01,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880485386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:01,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701777160] [2022-11-02 20:15:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:01,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:01,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:01,515 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:01,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:15:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:02,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1134 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:15:02,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-02 20:15:03,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:15:03,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701777160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:15:03,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:15:03,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 14 [2022-11-02 20:15:03,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91433397] [2022-11-02 20:15:03,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:15:03,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:15:03,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:03,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:15:03,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:15:03,275 INFO L87 Difference]: Start difference. First operand 222 states and 305 transitions. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-02 20:15:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:03,719 INFO L93 Difference]: Finished difference Result 397 states and 571 transitions. [2022-11-02 20:15:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:15:03,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 151 [2022-11-02 20:15:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:03,722 INFO L225 Difference]: With dead ends: 397 [2022-11-02 20:15:03,723 INFO L226 Difference]: Without dead ends: 235 [2022-11-02 20:15:03,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:15:03,725 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 22 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:03,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 876 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 128 Unchecked, 0.2s Time] [2022-11-02 20:15:03,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-02 20:15:03,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 229. [2022-11-02 20:15:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 156 states have (on average 1.1602564102564104) internal successors, (181), 161 states have internal predecessors, (181), 50 states have call successors, (50), 18 states have call predecessors, (50), 22 states have return successors, (83), 52 states have call predecessors, (83), 48 states have call successors, (83) [2022-11-02 20:15:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 314 transitions. [2022-11-02 20:15:03,767 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 314 transitions. Word has length 151 [2022-11-02 20:15:03,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:03,768 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 314 transitions. [2022-11-02 20:15:03,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-02 20:15:03,769 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 314 transitions. [2022-11-02 20:15:03,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-02 20:15:03,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:03,771 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:03,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:03,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-02 20:15:03,987 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:03,988 INFO L85 PathProgramCache]: Analyzing trace with hash 878944051, now seen corresponding path program 1 times [2022-11-02 20:15:03,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:03,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789010047] [2022-11-02 20:15:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:03,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:15:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:15:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:15:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:15:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:15:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:15:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-02 20:15:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-02 20:15:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-11-02 20:15:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-02 20:15:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-02 20:15:04,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:04,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789010047] [2022-11-02 20:15:04,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789010047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:04,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040899772] [2022-11-02 20:15:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:04,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:04,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:04,625 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:04,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:15:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:05,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:15:05,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-02 20:15:06,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:15:06,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040899772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:15:06,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:15:06,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 17 [2022-11-02 20:15:06,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919570424] [2022-11-02 20:15:06,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:15:06,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:15:06,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:06,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:15:06,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:15:06,152 INFO L87 Difference]: Start difference. First operand 229 states and 314 transitions. Second operand has 11 states, 10 states have (on average 7.2) internal successors, (72), 9 states have internal predecessors, (72), 3 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-02 20:15:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:06,397 INFO L93 Difference]: Finished difference Result 448 states and 651 transitions. [2022-11-02 20:15:06,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:15:06,397 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.2) internal successors, (72), 9 states have internal predecessors, (72), 3 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 151 [2022-11-02 20:15:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:06,400 INFO L225 Difference]: With dead ends: 448 [2022-11-02 20:15:06,400 INFO L226 Difference]: Without dead ends: 238 [2022-11-02 20:15:06,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:15:06,403 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 8 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:06,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1416 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:15:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-02 20:15:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 233. [2022-11-02 20:15:06,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 159 states have (on average 1.1572327044025157) internal successors, (184), 164 states have internal predecessors, (184), 50 states have call successors, (50), 18 states have call predecessors, (50), 23 states have return successors, (85), 53 states have call predecessors, (85), 48 states have call successors, (85) [2022-11-02 20:15:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 319 transitions. [2022-11-02 20:15:06,445 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 319 transitions. Word has length 151 [2022-11-02 20:15:06,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:06,445 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 319 transitions. [2022-11-02 20:15:06,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.2) internal successors, (72), 9 states have internal predecessors, (72), 3 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-02 20:15:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 319 transitions. [2022-11-02 20:15:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-02 20:15:06,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:06,448 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:06,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:06,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-02 20:15:06,675 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:06,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:06,676 INFO L85 PathProgramCache]: Analyzing trace with hash 216623027, now seen corresponding path program 1 times [2022-11-02 20:15:06,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:06,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542772260] [2022-11-02 20:15:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:06,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:15:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:15:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:15:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:15:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:15:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:15:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-02 20:15:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-02 20:15:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:06,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-11-02 20:15:06,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:07,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-02 20:15:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-02 20:15:07,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:07,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542772260] [2022-11-02 20:15:07,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542772260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:07,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179200604] [2022-11-02 20:15:07,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:07,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:07,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:07,013 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:07,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 20:15:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:08,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:15:08,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-02 20:15:08,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:15:08,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179200604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:15:08,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:15:08,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-02 20:15:08,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870527014] [2022-11-02 20:15:08,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:15:08,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:15:08,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:08,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:15:08,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:15:08,367 INFO L87 Difference]: Start difference. First operand 233 states and 319 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-02 20:15:08,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:08,417 INFO L93 Difference]: Finished difference Result 439 states and 633 transitions. [2022-11-02 20:15:08,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:15:08,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 151 [2022-11-02 20:15:08,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:08,420 INFO L225 Difference]: With dead ends: 439 [2022-11-02 20:15:08,420 INFO L226 Difference]: Without dead ends: 225 [2022-11-02 20:15:08,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:15:08,422 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 2 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:08,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 426 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:15:08,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-02 20:15:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2022-11-02 20:15:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 152 states have (on average 1.144736842105263) internal successors, (174), 156 states have internal predecessors, (174), 50 states have call successors, (50), 18 states have call predecessors, (50), 21 states have return successors, (75), 52 states have call predecessors, (75), 48 states have call successors, (75) [2022-11-02 20:15:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 299 transitions. [2022-11-02 20:15:08,460 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 299 transitions. Word has length 151 [2022-11-02 20:15:08,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:08,461 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 299 transitions. [2022-11-02 20:15:08,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-02 20:15:08,461 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 299 transitions. [2022-11-02 20:15:08,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-02 20:15:08,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:08,464 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:08,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:08,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-02 20:15:08,683 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:08,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:08,684 INFO L85 PathProgramCache]: Analyzing trace with hash 405010793, now seen corresponding path program 2 times [2022-11-02 20:15:08,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:08,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748594386] [2022-11-02 20:15:08,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:08,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:10,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:15:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:10,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:10,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:10,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:15:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:10,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:10,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:10,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:15:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:10,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:10,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:15:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:10,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:15:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:11,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:11,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:15:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:11,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 20:15:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:11,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-02 20:15:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:11,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:11,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-02 20:15:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:11,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-02 20:15:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-02 20:15:11,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:11,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748594386] [2022-11-02 20:15:11,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748594386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:11,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522924432] [2022-11-02 20:15:11,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:15:11,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:11,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:11,412 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:11,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 20:15:12,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:15:12,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:15:12,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:15:12,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:12,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-02 20:15:12,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-02 20:15:14,678 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_init_~list.offset_BEFORE_CALL_5 Int) (v_aws_linked_list_init_~list.base_BEFORE_CALL_5 Int)) (let ((.cse0 (+ v_aws_linked_list_init_~list.offset_BEFORE_CALL_5 24))) (and (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_init_~list.base_BEFORE_CALL_5) .cse0) v_aws_linked_list_init_~list.offset_BEFORE_CALL_5) (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_init_~list.base_BEFORE_CALL_5) .cse0) v_aws_linked_list_init_~list.base_BEFORE_CALL_5)))) is different from true [2022-11-02 20:15:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-02 20:15:15,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:15:15,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522924432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:15:15,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:15:15,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 22 [2022-11-02 20:15:15,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650853727] [2022-11-02 20:15:15,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:15:15,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:15:15,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:15,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:15:15,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=379, Unknown=1, NotChecked=38, Total=462 [2022-11-02 20:15:15,373 INFO L87 Difference]: Start difference. First operand 224 states and 299 transitions. Second operand has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-02 20:15:15,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:15,616 INFO L93 Difference]: Finished difference Result 345 states and 461 transitions. [2022-11-02 20:15:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:15:15,616 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 152 [2022-11-02 20:15:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:15,619 INFO L225 Difference]: With dead ends: 345 [2022-11-02 20:15:15,620 INFO L226 Difference]: Without dead ends: 227 [2022-11-02 20:15:15,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=49, Invalid=416, Unknown=1, NotChecked=40, Total=506 [2022-11-02 20:15:15,621 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 6 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:15,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 795 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 390 Unchecked, 0.1s Time] [2022-11-02 20:15:15,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-02 20:15:15,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2022-11-02 20:15:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 148 states have (on average 1.1418918918918919) internal successors, (169), 152 states have internal predecessors, (169), 50 states have call successors, (50), 18 states have call predecessors, (50), 21 states have return successors, (75), 52 states have call predecessors, (75), 48 states have call successors, (75) [2022-11-02 20:15:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 294 transitions. [2022-11-02 20:15:15,660 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 294 transitions. Word has length 152 [2022-11-02 20:15:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:15,661 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 294 transitions. [2022-11-02 20:15:15,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-02 20:15:15,661 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 294 transitions. [2022-11-02 20:15:15,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-02 20:15:15,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:15,663 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:15:15,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:15,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:15,891 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:15,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:15,892 INFO L85 PathProgramCache]: Analyzing trace with hash 270149221, now seen corresponding path program 1 times [2022-11-02 20:15:15,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:15,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645154296] [2022-11-02 20:15:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:16,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:15:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:16,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:16,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:16,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:15:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:16,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:16,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:16,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:15:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:16,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:16,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:15:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:16,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:15:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:17,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:17,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:15:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:17,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 20:15:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:17,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-02 20:15:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:17,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:17,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-02 20:15:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:17,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-02 20:15:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-02 20:15:17,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:17,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645154296] [2022-11-02 20:15:17,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645154296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:17,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080186937] [2022-11-02 20:15:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:17,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:17,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:17,224 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:17,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-02 20:15:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:18,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-02 20:15:18,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:18,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-02 20:15:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 111 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 20:15:21,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:23,576 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_aws_linked_list_empty_~list.base_20 Int) (v_aws_linked_list_empty_~list.offset_20 Int)) (= (+ v_aws_linked_list_empty_~list.offset_20 16) (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_empty_~list.base_20) v_aws_linked_list_empty_~list.offset_20))) (forall ((v_aws_linked_list_empty_~list.base_20 Int) (v_aws_linked_list_empty_~list.offset_20 Int)) (= v_aws_linked_list_empty_~list.base_20 (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_empty_~list.base_20) v_aws_linked_list_empty_~list.offset_20)))) is different from false [2022-11-02 20:15:23,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080186937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:23,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:15:23,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 28] total 41 [2022-11-02 20:15:23,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465458632] [2022-11-02 20:15:23,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:15:23,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-02 20:15:23,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:23,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-02 20:15:23,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1593, Unknown=1, NotChecked=80, Total=1806 [2022-11-02 20:15:23,581 INFO L87 Difference]: Start difference. First operand 220 states and 294 transitions. Second operand has 41 states, 37 states have (on average 4.297297297297297) internal successors, (159), 36 states have internal predecessors, (159), 16 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (29), 15 states have call predecessors, (29), 16 states have call successors, (29) [2022-11-02 20:15:28,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:28,154 INFO L93 Difference]: Finished difference Result 540 states and 751 transitions. [2022-11-02 20:15:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-02 20:15:28,155 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 4.297297297297297) internal successors, (159), 36 states have internal predecessors, (159), 16 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (29), 15 states have call predecessors, (29), 16 states have call successors, (29) Word has length 152 [2022-11-02 20:15:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:28,157 INFO L225 Difference]: With dead ends: 540 [2022-11-02 20:15:28,157 INFO L226 Difference]: Without dead ends: 353 [2022-11-02 20:15:28,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=373, Invalid=5482, Unknown=1, NotChecked=150, Total=6006 [2022-11-02 20:15:28,160 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 184 mSDsluCounter, 2131 mSDsCounter, 0 mSdLazyCounter, 2296 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 2324 SdHoareTripleChecker+Invalid, 4395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1965 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:28,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 2324 Invalid, 4395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2296 Invalid, 0 Unknown, 1965 Unchecked, 2.9s Time] [2022-11-02 20:15:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-02 20:15:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 289. [2022-11-02 20:15:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 202 states have (on average 1.1287128712871286) internal successors, (228), 207 states have internal predecessors, (228), 58 states have call successors, (58), 24 states have call predecessors, (58), 28 states have return successors, (84), 60 states have call predecessors, (84), 56 states have call successors, (84) [2022-11-02 20:15:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 370 transitions. [2022-11-02 20:15:28,217 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 370 transitions. Word has length 152 [2022-11-02 20:15:28,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:28,217 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 370 transitions. [2022-11-02 20:15:28,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 4.297297297297297) internal successors, (159), 36 states have internal predecessors, (159), 16 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (29), 15 states have call predecessors, (29), 16 states have call successors, (29) [2022-11-02 20:15:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 370 transitions. [2022-11-02 20:15:28,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-02 20:15:28,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:28,220 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:28,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:28,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:28,435 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:28,436 INFO L85 PathProgramCache]: Analyzing trace with hash -5291877, now seen corresponding path program 1 times [2022-11-02 20:15:28,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:28,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095152126] [2022-11-02 20:15:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:28,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:28,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:15:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:28,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:28,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:28,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:15:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:28,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:29,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:29,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:15:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:29,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:29,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:15:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:29,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 20:15:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:29,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-02 20:15:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:29,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:29,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 20:15:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:29,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-02 20:15:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:29,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:29,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-11-02 20:15:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:29,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-02 20:15:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:29,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-02 20:15:29,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:29,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095152126] [2022-11-02 20:15:29,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095152126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:15:29,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:15:29,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 20:15:29,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542538260] [2022-11-02 20:15:29,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:15:29,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:15:29,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:29,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:15:29,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:15:29,437 INFO L87 Difference]: Start difference. First operand 289 states and 370 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-02 20:15:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:30,971 INFO L93 Difference]: Finished difference Result 434 states and 580 transitions. [2022-11-02 20:15:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:15:30,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 164 [2022-11-02 20:15:30,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:30,974 INFO L225 Difference]: With dead ends: 434 [2022-11-02 20:15:30,974 INFO L226 Difference]: Without dead ends: 301 [2022-11-02 20:15:30,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:15:30,976 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 154 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:30,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 528 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:15:30,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-02 20:15:31,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 292. [2022-11-02 20:15:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 204 states have (on average 1.1274509803921569) internal successors, (230), 210 states have internal predecessors, (230), 58 states have call successors, (58), 24 states have call predecessors, (58), 29 states have return successors, (85), 60 states have call predecessors, (85), 56 states have call successors, (85) [2022-11-02 20:15:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 373 transitions. [2022-11-02 20:15:31,033 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 373 transitions. Word has length 164 [2022-11-02 20:15:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:31,034 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 373 transitions. [2022-11-02 20:15:31,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-02 20:15:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 373 transitions. [2022-11-02 20:15:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-02 20:15:31,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:31,037 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:31,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-02 20:15:31,037 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:31,038 INFO L85 PathProgramCache]: Analyzing trace with hash -263457315, now seen corresponding path program 1 times [2022-11-02 20:15:31,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:31,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251997094] [2022-11-02 20:15:31,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:31,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:32,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:15:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:33,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:33,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:33,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:15:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:33,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:33,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:33,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:15:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:33,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:33,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:15:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:34,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 20:15:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:34,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-02 20:15:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:34,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:34,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 20:15:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:34,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-02 20:15:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:34,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:34,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-11-02 20:15:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:34,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-02 20:15:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:34,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-02 20:15:34,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:34,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251997094] [2022-11-02 20:15:34,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251997094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:34,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306753791] [2022-11-02 20:15:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:34,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:34,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:34,070 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:34,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-02 20:15:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:35,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-02 20:15:35,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:35,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:35,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:35,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:35,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-02 20:15:35,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:35,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:35,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:35,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-11-02 20:15:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 66 proven. 16 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-02 20:15:37,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-02 20:15:39,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306753791] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:39,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:15:39,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [19, 22] total 48 [2022-11-02 20:15:39,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170659445] [2022-11-02 20:15:39,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:15:39,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:15:39,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:39,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:15:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2125, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:15:39,550 INFO L87 Difference]: Start difference. First operand 292 states and 373 transitions. Second operand has 11 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-02 20:15:41,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:41,066 INFO L93 Difference]: Finished difference Result 435 states and 576 transitions. [2022-11-02 20:15:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:15:41,067 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 164 [2022-11-02 20:15:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:41,070 INFO L225 Difference]: With dead ends: 435 [2022-11-02 20:15:41,070 INFO L226 Difference]: Without dead ends: 299 [2022-11-02 20:15:41,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=163, Invalid=2593, Unknown=0, NotChecked=0, Total=2756 [2022-11-02 20:15:41,073 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 47 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:41,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 859 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:15:41,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-02 20:15:41,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 293. [2022-11-02 20:15:41,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 205 states have (on average 1.1268292682926828) internal successors, (231), 211 states have internal predecessors, (231), 58 states have call successors, (58), 24 states have call predecessors, (58), 29 states have return successors, (85), 60 states have call predecessors, (85), 56 states have call successors, (85) [2022-11-02 20:15:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 374 transitions. [2022-11-02 20:15:41,115 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 374 transitions. Word has length 164 [2022-11-02 20:15:41,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:41,116 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 374 transitions. [2022-11-02 20:15:41,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-02 20:15:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 374 transitions. [2022-11-02 20:15:41,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-02 20:15:41,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:41,119 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:41,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:41,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-02 20:15:41,337 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:41,337 INFO L85 PathProgramCache]: Analyzing trace with hash 5864036, now seen corresponding path program 1 times [2022-11-02 20:15:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:41,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731006705] [2022-11-02 20:15:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:41,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:15:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:15:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:15:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:15:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:15:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-02 20:15:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-02 20:15:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-02 20:15:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-02 20:15:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-02 20:15:41,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:41,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731006705] [2022-11-02 20:15:41,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731006705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:15:41,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:15:41,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-02 20:15:41,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390105098] [2022-11-02 20:15:41,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:15:41,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:15:41,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:41,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:15:41,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:15:41,941 INFO L87 Difference]: Start difference. First operand 293 states and 374 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-02 20:15:43,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:15:43,547 INFO L93 Difference]: Finished difference Result 436 states and 574 transitions. [2022-11-02 20:15:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:15:43,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 153 [2022-11-02 20:15:43,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:15:43,550 INFO L225 Difference]: With dead ends: 436 [2022-11-02 20:15:43,550 INFO L226 Difference]: Without dead ends: 299 [2022-11-02 20:15:43,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:15:43,552 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 141 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:15:43,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 550 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:15:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-02 20:15:43,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 297. [2022-11-02 20:15:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 208 states have (on average 1.125) internal successors, (234), 214 states have internal predecessors, (234), 58 states have call successors, (58), 24 states have call predecessors, (58), 30 states have return successors, (88), 61 states have call predecessors, (88), 56 states have call successors, (88) [2022-11-02 20:15:43,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 380 transitions. [2022-11-02 20:15:43,618 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 380 transitions. Word has length 153 [2022-11-02 20:15:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:15:43,618 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 380 transitions. [2022-11-02 20:15:43,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-02 20:15:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 380 transitions. [2022-11-02 20:15:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-02 20:15:43,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:15:43,621 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:43,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-02 20:15:43,622 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:15:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:43,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2039789455, now seen corresponding path program 1 times [2022-11-02 20:15:43,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:43,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473465026] [2022-11-02 20:15:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:43,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:46,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:15:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:46,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:46,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:46,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:15:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:59,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:59,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:15:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:59,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-02 20:15:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:59,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:59,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:15:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:59,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-02 20:15:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:59,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-02 20:15:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:59,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:15:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:59,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:15:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:59,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-02 20:15:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:59,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-11-02 20:15:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:59,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:15:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:59,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-02 20:15:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-02 20:15:59,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:59,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473465026] [2022-11-02 20:15:59,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473465026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:59,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340635281] [2022-11-02 20:15:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:59,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:59,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:59,768 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:59,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-02 20:16:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:01,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-02 20:16:01,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:16:01,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:16:01,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-02 20:16:01,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-02 20:16:01,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:16:01,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:16:02,080 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_18766 (Array Int Int)) (v_ArrVal_18767 (Array Int Int)) (v_ArrVal_18764 (Array Int Int)) (v_ArrVal_18765 (Array Int Int)) (ensure_linked_list_is_allocated_~node~0.base Int) (v_ArrVal_18768 (Array Int Int)) (ensure_linked_list_is_allocated_~curr~0.base Int) (v_ArrVal_18769 (Array Int Int)) (v_ArrVal_18770 (Array Int Int)) (v_ArrVal_18763 (Array Int Int))) (and (<= ensure_linked_list_is_allocated_~curr~0.base ensure_linked_list_is_allocated_~node~0.base) (= (store (store (store (store |c_old(#memory_$Pointer$.base)| |c_ensure_linked_list_is_allocated_#in~list.base| v_ArrVal_18764) ensure_linked_list_is_allocated_~node~0.base v_ArrVal_18766) ensure_linked_list_is_allocated_~curr~0.base v_ArrVal_18770) |c_ensure_linked_list_is_allocated_#in~list.base| v_ArrVal_18769) |c_#memory_$Pointer$.base|) (< ensure_linked_list_is_allocated_~node~0.base |c_#StackHeapBarrier|) (= (store (store (store (store |c_old(#memory_$Pointer$.offset)| |c_ensure_linked_list_is_allocated_#in~list.base| v_ArrVal_18765) ensure_linked_list_is_allocated_~node~0.base v_ArrVal_18763) ensure_linked_list_is_allocated_~curr~0.base v_ArrVal_18767) |c_ensure_linked_list_is_allocated_#in~list.base| v_ArrVal_18768) |c_#memory_$Pointer$.offset|))) is different from true [2022-11-02 20:16:02,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:16:02,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:16:02,196 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-02 20:16:02,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2022-11-02 20:16:02,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:16:02,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:16:02,260 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-02 20:16:02,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 37 [2022-11-02 20:16:04,242 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:16:04,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 13 [2022-11-02 20:16:04,256 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:16:04,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 10 [2022-11-02 20:16:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 39 proven. 24 refuted. 0 times theorem prover too weak. 109 trivial. 2 not checked. [2022-11-02 20:16:04,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:16:04,842 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ensure_linked_list_is_allocated_~node~0.base_4 Int)) (or (not (< v_ensure_linked_list_is_allocated_~node~0.base_4 |c_#StackHeapBarrier|)) (forall ((v_ensure_linked_list_is_allocated_~curr~0.base_39 Int)) (or (not (<= v_ensure_linked_list_is_allocated_~curr~0.base_39 v_ensure_linked_list_is_allocated_~node~0.base_4)) (forall ((v_ArrVal_18789 (Array Int Int)) (v_ArrVal_18791 (Array Int Int)) (v_ArrVal_18792 (Array Int Int)) (v_ArrVal_18795 (Array Int Int))) (= (+ |c_ULTIMATE.start_aws_linked_list_swap_contents_harness_~#a~0#1.offset| 16) (select (select (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_aws_linked_list_swap_contents_harness_~#b~0#1.base| v_ArrVal_18792) v_ensure_linked_list_is_allocated_~node~0.base_4 v_ArrVal_18795) v_ensure_linked_list_is_allocated_~curr~0.base_39 v_ArrVal_18791) |c_ULTIMATE.start_aws_linked_list_swap_contents_harness_~#b~0#1.base| v_ArrVal_18789) |c_ULTIMATE.start_aws_linked_list_swap_contents_harness_~#a~0#1.base|) |c_ULTIMATE.start_aws_linked_list_swap_contents_harness_~#a~0#1.offset|))))))) (forall ((v_ensure_linked_list_is_allocated_~node~0.base_4 Int)) (or (not (< v_ensure_linked_list_is_allocated_~node~0.base_4 |c_#StackHeapBarrier|)) (forall ((v_ensure_linked_list_is_allocated_~curr~0.base_39 Int)) (or (not (<= v_ensure_linked_list_is_allocated_~curr~0.base_39 v_ensure_linked_list_is_allocated_~node~0.base_4)) (forall ((v_ArrVal_18790 (Array Int Int)) (v_ArrVal_18796 (Array Int Int)) (v_ArrVal_18793 (Array Int Int)) (v_ArrVal_18794 (Array Int Int))) (= (select (select (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_linked_list_swap_contents_harness_~#b~0#1.base| v_ArrVal_18793) v_ensure_linked_list_is_allocated_~node~0.base_4 v_ArrVal_18796) v_ensure_linked_list_is_allocated_~curr~0.base_39 v_ArrVal_18790) |c_ULTIMATE.start_aws_linked_list_swap_contents_harness_~#b~0#1.base| v_ArrVal_18794) |c_ULTIMATE.start_aws_linked_list_swap_contents_harness_~#a~0#1.base|) |c_ULTIMATE.start_aws_linked_list_swap_contents_harness_~#a~0#1.offset|) |c_ULTIMATE.start_aws_linked_list_swap_contents_harness_~#a~0#1.base|))))))) is different from false [2022-11-02 20:16:04,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340635281] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:16:04,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:16:04,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2022-11-02 20:16:04,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18312397] [2022-11-02 20:16:04,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:16:04,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:16:04,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:04,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:16:04,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=670, Unknown=4, NotChecked=106, Total=870 [2022-11-02 20:16:04,848 INFO L87 Difference]: Start difference. First operand 297 states and 380 transitions. Second operand has 26 states, 24 states have (on average 4.916666666666667) internal successors, (118), 21 states have internal predecessors, (118), 12 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (25), 13 states have call predecessors, (25), 12 states have call successors, (25) [2022-11-02 20:16:12,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:12,379 INFO L93 Difference]: Finished difference Result 648 states and 838 transitions. [2022-11-02 20:16:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:16:12,380 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.916666666666667) internal successors, (118), 21 states have internal predecessors, (118), 12 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (25), 13 states have call predecessors, (25), 12 states have call successors, (25) Word has length 157 [2022-11-02 20:16:12,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:12,385 INFO L225 Difference]: With dead ends: 648 [2022-11-02 20:16:12,385 INFO L226 Difference]: Without dead ends: 511 [2022-11-02 20:16:12,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 289 SyntacticMatches, 10 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=180, Invalid=1293, Unknown=17, NotChecked=150, Total=1640 [2022-11-02 20:16:12,387 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 161 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 2795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1003 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:12,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 1427 Invalid, 2795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1686 Invalid, 0 Unknown, 1003 Unchecked, 3.5s Time] [2022-11-02 20:16:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-02 20:16:12,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 453. [2022-11-02 20:16:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 328 states have (on average 1.1128048780487805) internal successors, (365), 338 states have internal predecessors, (365), 78 states have call successors, (78), 36 states have call predecessors, (78), 46 states have return successors, (118), 81 states have call predecessors, (118), 76 states have call successors, (118) [2022-11-02 20:16:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 561 transitions. [2022-11-02 20:16:12,485 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 561 transitions. Word has length 157 [2022-11-02 20:16:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:12,485 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 561 transitions. [2022-11-02 20:16:12,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.916666666666667) internal successors, (118), 21 states have internal predecessors, (118), 12 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (25), 13 states have call predecessors, (25), 12 states have call successors, (25) [2022-11-02 20:16:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 561 transitions. [2022-11-02 20:16:12,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-02 20:16:12,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:12,489 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-02 20:16:12,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-02 20:16:12,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-02 20:16:12,695 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:16:12,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:12,696 INFO L85 PathProgramCache]: Analyzing trace with hash -303210987, now seen corresponding path program 1 times [2022-11-02 20:16:12,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:12,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651138328] [2022-11-02 20:16:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:12,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:12,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:16:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:12,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:16:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:12,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:16:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:12,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:16:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:13,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:16:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:13,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:16:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:13,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:16:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:13,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:16:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:13,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:16:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:13,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:16:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:13,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:16:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:13,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-02 20:16:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:13,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-02 20:16:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:13,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:16:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:13,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-02 20:16:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:13,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-02 20:16:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:13,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:16:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-02 20:16:13,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:13,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651138328] [2022-11-02 20:16:13,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651138328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:16:13,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:16:13,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:16:13,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751977724] [2022-11-02 20:16:13,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:16:13,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:16:13,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:16:13,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:16:13,141 INFO L87 Difference]: Start difference. First operand 453 states and 561 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-02 20:16:14,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:14,038 INFO L93 Difference]: Finished difference Result 463 states and 572 transitions. [2022-11-02 20:16:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:16:14,038 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 156 [2022-11-02 20:16:14,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:14,042 INFO L225 Difference]: With dead ends: 463 [2022-11-02 20:16:14,042 INFO L226 Difference]: Without dead ends: 461 [2022-11-02 20:16:14,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:16:14,044 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 60 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:14,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 533 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:16:14,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-02 20:16:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 459. [2022-11-02 20:16:14,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 331 states have (on average 1.1117824773413898) internal successors, (368), 341 states have internal predecessors, (368), 80 states have call successors, (80), 37 states have call predecessors, (80), 47 states have return successors, (120), 83 states have call predecessors, (120), 78 states have call successors, (120) [2022-11-02 20:16:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 568 transitions. [2022-11-02 20:16:14,147 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 568 transitions. Word has length 156 [2022-11-02 20:16:14,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:14,148 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 568 transitions. [2022-11-02 20:16:14,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-02 20:16:14,149 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 568 transitions. [2022-11-02 20:16:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-02 20:16:14,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:14,152 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:14,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-02 20:16:14,152 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:16:14,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:14,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1360457641, now seen corresponding path program 1 times [2022-11-02 20:16:14,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:14,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122449825] [2022-11-02 20:16:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:14,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:14,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:16:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:14,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:16:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:14,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:16:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:14,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:16:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:14,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:16:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:14,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:16:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:14,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-02 20:16:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:14,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:16:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:14,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 20:16:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:14,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-02 20:16:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:14,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:16:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:15,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:16:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:15,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-02 20:16:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:15,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-02 20:16:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:15,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:16:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:15,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-02 20:16:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:15,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-11-02 20:16:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 41 proven. 12 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-02 20:16:15,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:15,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122449825] [2022-11-02 20:16:15,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122449825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:16:15,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701401562] [2022-11-02 20:16:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:15,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:15,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:15,099 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:16:15,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-02 20:16:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:16,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:16:16,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:16:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-02 20:16:16,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:16:16,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701401562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:16:16,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:16:16,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2022-11-02 20:16:16,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284989335] [2022-11-02 20:16:16,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:16:16,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:16:16,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:16:16,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:16:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:16:16,917 INFO L87 Difference]: Start difference. First operand 459 states and 568 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:16:17,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:17,771 INFO L93 Difference]: Finished difference Result 579 states and 730 transitions. [2022-11-02 20:16:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:16:17,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 156 [2022-11-02 20:16:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:17,775 INFO L225 Difference]: With dead ends: 579 [2022-11-02 20:16:17,775 INFO L226 Difference]: Without dead ends: 458 [2022-11-02 20:16:17,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:16:17,777 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 186 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:17,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 756 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:16:17,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-11-02 20:16:17,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 421. [2022-11-02 20:16:17,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 301 states have (on average 1.1162790697674418) internal successors, (336), 312 states have internal predecessors, (336), 75 states have call successors, (75), 33 states have call predecessors, (75), 44 states have return successors, (112), 78 states have call predecessors, (112), 73 states have call successors, (112) [2022-11-02 20:16:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 523 transitions. [2022-11-02 20:16:17,878 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 523 transitions. Word has length 156 [2022-11-02 20:16:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:17,879 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 523 transitions. [2022-11-02 20:16:17,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:16:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 523 transitions. [2022-11-02 20:16:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-02 20:16:17,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:17,882 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:17,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-02 20:16:18,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-02 20:16:18,095 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:16:18,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:18,096 INFO L85 PathProgramCache]: Analyzing trace with hash -854666443, now seen corresponding path program 2 times [2022-11-02 20:16:18,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:18,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809505967] [2022-11-02 20:16:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:18,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:16:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:16:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:16:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:16:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:16:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:16:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:16:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:16:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:16:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:16:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:16:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-02 20:16:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-02 20:16:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:16:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-02 20:16:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-02 20:16:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:16:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:16:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:16:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-02 20:16:19,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:16:19,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809505967] [2022-11-02 20:16:19,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809505967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:16:19,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918951773] [2022-11-02 20:16:19,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:16:19,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:19,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:16:19,988 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:16:19,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eaadef7-96c7-4585-a8f7-d53c27c23545/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-02 20:16:21,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:16:21,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:16:21,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 20:16:21,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:16:21,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-11-02 20:16:21,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-02 20:16:23,570 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_init_~list.offset_BEFORE_CALL_9 Int) (v_aws_linked_list_init_~list.base_BEFORE_CALL_10 Int)) (and (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_init_~list.base_BEFORE_CALL_10) v_aws_linked_list_init_~list.offset_BEFORE_CALL_9) (+ v_aws_linked_list_init_~list.offset_BEFORE_CALL_9 16)) (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_init_~list.base_BEFORE_CALL_10) v_aws_linked_list_init_~list.offset_BEFORE_CALL_9) v_aws_linked_list_init_~list.base_BEFORE_CALL_10))) is different from true