./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/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 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 --- 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 21:02:50,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:02:50,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:02:50,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:02:50,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:02:50,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:02:50,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:02:50,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:02:50,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:02:50,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:02:50,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:02:50,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:02:50,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:02:50,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:02:50,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:02:50,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:02:50,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:02:50,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:02:50,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:02:50,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:02:50,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:02:50,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:02:50,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:02:50,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:02:50,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:02:50,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:02:50,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:02:50,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:02:50,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:02:50,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:02:50,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:02:50,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:02:50,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:02:50,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:02:50,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:02:50,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:02:50,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:02:50,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:02:50,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:02:50,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:02:50,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:02:50,703 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 21:02:50,741 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:02:50,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:02:50,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:02:50,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:02:50,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:02:50,743 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:02:50,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:02:50,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:02:50,744 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:02:50,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:02:50,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:02:50,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:02:50,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:02:50,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:02:50,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:02:50,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:02:50,747 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:02:50,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:02:50,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:02:50,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:02:50,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:02:50,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:02:50,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:02:50,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:02:50,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:02:50,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:02:50,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:02:50,749 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:02:50,749 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:02:50,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:02:50,750 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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 [2022-11-02 21:02:51,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:02:51,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:02:51,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:02:51,110 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:02:51,112 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:02:51,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2022-11-02 21:02:51,191 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/data/9124fdfb3/8224aca040664888b9030d8926230858/FLAG806b3be3e [2022-11-02 21:02:52,022 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:02:52,025 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2022-11-02 21:02:52,071 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/data/9124fdfb3/8224aca040664888b9030d8926230858/FLAG806b3be3e [2022-11-02 21:02:52,151 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/data/9124fdfb3/8224aca040664888b9030d8926230858 [2022-11-02 21:02:52,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:02:52,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:02:52,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:02:52,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:02:52,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:02:52,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:02:52" (1/1) ... [2022-11-02 21:02:52,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee6ecdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:52, skipping insertion in model container [2022-11-02 21:02:52,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:02:52" (1/1) ... [2022-11-02 21:02:52,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:02:52,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:02:52,658 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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2022-11-02 21:02:52,665 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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2022-11-02 21:02:53,518 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:53,519 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:53,520 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:53,521 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:53,522 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:53,557 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:53,557 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:53,559 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:53,560 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:53,562 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:53,563 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:53,564 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:53,568 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:53,997 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 21:02:53,998 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 21:02:53,999 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 21:02:54,000 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 21:02:54,002 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 21:02:54,003 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 21:02:54,004 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 21:02:54,005 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 21:02:54,006 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 21:02:54,006 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 21:02:54,188 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 21:02:54,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:02:54,230 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:02:54,245 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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2022-11-02 21:02:54,246 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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2022-11-02 21:02:54,296 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:54,297 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:54,298 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:54,298 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:54,299 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:54,307 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:54,308 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:54,309 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:54,310 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:54,311 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:54,312 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:54,312 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:54,313 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:02:54,352 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 21:02:54,354 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 21:02:54,354 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 21:02:54,355 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 21:02:54,357 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 21:02:54,357 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 21:02:54,358 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 21:02:54,359 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 21:02:54,359 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 21:02:54,360 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 21:02:54,384 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 21:02:54,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:02:54,667 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:02:54,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:54 WrapperNode [2022-11-02 21:02:54,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:02:54,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:02:54,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:02:54,669 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:02:54,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:54" (1/1) ... [2022-11-02 21:02:54,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:54" (1/1) ... [2022-11-02 21:02:54,840 INFO L138 Inliner]: procedures = 679, calls = 1041, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 142 [2022-11-02 21:02:54,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:02:54,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:02:54,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:02:54,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:02:54,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:54" (1/1) ... [2022-11-02 21:02:54,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:54" (1/1) ... [2022-11-02 21:02:54,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:54" (1/1) ... [2022-11-02 21:02:54,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:54" (1/1) ... [2022-11-02 21:02:54,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:54" (1/1) ... [2022-11-02 21:02:54,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:54" (1/1) ... [2022-11-02 21:02:54,905 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:54" (1/1) ... [2022-11-02 21:02:54,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:54" (1/1) ... [2022-11-02 21:02:54,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:02:54,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:02:54,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:02:54,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:02:54,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:54" (1/1) ... [2022-11-02 21:02:54,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:02:54,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:54,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:02:54,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:02:55,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:02:55,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 21:02:55,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 21:02:55,014 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-02 21:02:55,014 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-02 21:02:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 21:02:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-02 21:02:55,017 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-02 21:02:55,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:02:55,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 21:02:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:02:55,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:02:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 21:02:55,019 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 21:02:55,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:02:55,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 21:02:55,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 21:02:55,020 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-02 21:02:55,020 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-02 21:02:55,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:02:55,352 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:02:55,354 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:02:55,675 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:02:55,692 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:02:55,695 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 21:02:55,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:02:55 BoogieIcfgContainer [2022-11-02 21:02:55,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:02:55,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:02:55,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:02:55,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:02:55,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:02:52" (1/3) ... [2022-11-02 21:02:55,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c9bb9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:02:55, skipping insertion in model container [2022-11-02 21:02:55,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:54" (2/3) ... [2022-11-02 21:02:55,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c9bb9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:02:55, skipping insertion in model container [2022-11-02 21:02:55,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:02:55" (3/3) ... [2022-11-02 21:02:55,712 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rbegin_harness.i [2022-11-02 21:02:55,738 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:02:55,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:02:55,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:02:55,833 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;@eb12dcb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:02:55,833 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:02:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-02 21:02:55,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 21:02:55,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:55,853 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:55,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:55,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:55,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1062572114, now seen corresponding path program 1 times [2022-11-02 21:02:55,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:55,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183693353] [2022-11-02 21:02:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:55,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:56,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:02:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:56,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:02:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:56,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:02:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:56,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:02:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:56,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-02 21:02:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:56,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 21:02:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:56,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 21:02:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 21:02:56,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:56,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183693353] [2022-11-02 21:02:56,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183693353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:56,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:56,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:02:56,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405253606] [2022-11-02 21:02:56,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:56,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 21:02:56,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:56,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 21:02:56,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:02:56,683 INFO L87 Difference]: Start difference. First operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:02:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:56,717 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2022-11-02 21:02:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 21:02:56,722 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2022-11-02 21:02:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:56,732 INFO L225 Difference]: With dead ends: 130 [2022-11-02 21:02:56,733 INFO L226 Difference]: Without dead ends: 64 [2022-11-02 21:02:56,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:02:56,741 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:56,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:02:56,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-02 21:02:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-02 21:02:56,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-02 21:02:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2022-11-02 21:02:56,807 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 68 [2022-11-02 21:02:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:56,807 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2022-11-02 21:02:56,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:02:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2022-11-02 21:02:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 21:02:56,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:56,811 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:56,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:02:56,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:56,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:56,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1946087212, now seen corresponding path program 1 times [2022-11-02 21:02:56,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:56,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941042745] [2022-11-02 21:02:56,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:56,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:57,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:02:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:57,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:02:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:57,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:02:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:57,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:02:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:57,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-02 21:02:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:57,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 21:02:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:57,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 21:02:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-02 21:02:57,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:57,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941042745] [2022-11-02 21:02:57,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941042745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:57,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578913196] [2022-11-02 21:02:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:57,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:57,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:57,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:57,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:02:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:57,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-02 21:02:58,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:58,184 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 18 treesize of output 19 [2022-11-02 21:02:58,219 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 18 treesize of output 19 [2022-11-02 21:02:58,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:02:58,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:02:58,375 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 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-02 21:02:58,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:02:58,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:02:58,395 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 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-02 21:02:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:02:59,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:59,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578913196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:59,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:02:59,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2022-11-02 21:02:59,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316382565] [2022-11-02 21:02:59,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:59,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:02:59,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:59,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:02:59,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:02:59,232 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 21:02:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:59,332 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2022-11-02 21:02:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:02:59,333 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 68 [2022-11-02 21:02:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:59,336 INFO L225 Difference]: With dead ends: 136 [2022-11-02 21:02:59,337 INFO L226 Difference]: Without dead ends: 89 [2022-11-02 21:02:59,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-02 21:02:59,339 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 17 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:59,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 397 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 67 Unchecked, 0.0s Time] [2022-11-02 21:02:59,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-02 21:02:59,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-02 21:02:59,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 64 states have (on average 1.3125) internal successors, (84), 67 states have internal predecessors, (84), 16 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (18), 14 states have call predecessors, (18), 15 states have call successors, (18) [2022-11-02 21:02:59,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2022-11-02 21:02:59,355 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 68 [2022-11-02 21:02:59,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:59,355 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2022-11-02 21:02:59,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 21:02:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2022-11-02 21:02:59,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 21:02:59,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:59,358 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:59,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 21:02:59,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:59,573 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:59,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2008126826, now seen corresponding path program 1 times [2022-11-02 21:02:59,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:59,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789671482] [2022-11-02 21:02:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:59,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:59,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:02:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:59,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:02:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:59,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:02:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:59,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:02:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:59,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-02 21:02:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:00,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 21:03:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:00,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 21:03:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-02 21:03:00,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:00,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789671482] [2022-11-02 21:03:00,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789671482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:00,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144761805] [2022-11-02 21:03:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:00,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:00,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:00,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:00,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:03:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:00,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-02 21:03:00,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:00,397 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-02 21:03:00,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-02 21:03:00,426 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:03:00,426 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 21:03:00,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-02 21:03:00,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-02 21:03:00,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2022-11-02 21:03:00,593 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 7 treesize of output 3 [2022-11-02 21:03:01,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 21:03:01,028 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 21:03:01,028 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 38 treesize of output 22 [2022-11-02 21:03:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 34 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:03:01,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:02,401 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:03:02,402 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 118 treesize of output 120 [2022-11-02 21:03:02,412 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 128 treesize of output 120 [2022-11-02 21:03:02,424 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 59 treesize of output 55 [2022-11-02 21:03:02,440 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 138 treesize of output 126 [2022-11-02 21:03:02,454 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 126 treesize of output 118 [2022-11-02 21:03:02,469 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 118 treesize of output 102 [2022-11-02 21:03:02,541 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 63 treesize of output 55 [2022-11-02 21:03:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:03:02,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144761805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:02,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:03:02,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 15] total 33 [2022-11-02 21:03:02,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732529864] [2022-11-02 21:03:02,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:02,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:03:02,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:02,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:03:02,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:03:02,726 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand has 33 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 29 states have internal predecessors, (101), 10 states have call successors, (18), 4 states have call predecessors, (18), 9 states have return successors, (17), 6 states have call predecessors, (17), 10 states have call successors, (17) [2022-11-02 21:03:05,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:05,148 INFO L93 Difference]: Finished difference Result 298 states and 449 transitions. [2022-11-02 21:03:05,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-02 21:03:05,149 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 29 states have internal predecessors, (101), 10 states have call successors, (18), 4 states have call predecessors, (18), 9 states have return successors, (17), 6 states have call predecessors, (17), 10 states have call successors, (17) Word has length 68 [2022-11-02 21:03:05,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:05,162 INFO L225 Difference]: With dead ends: 298 [2022-11-02 21:03:05,162 INFO L226 Difference]: Without dead ends: 201 [2022-11-02 21:03:05,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=289, Invalid=2903, Unknown=0, NotChecked=0, Total=3192 [2022-11-02 21:03:05,165 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 259 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 2239 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:05,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 2239 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 934 Invalid, 0 Unknown, 426 Unchecked, 1.2s Time] [2022-11-02 21:03:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-02 21:03:05,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 177. [2022-11-02 21:03:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 137 states have (on average 1.3795620437956204) internal successors, (189), 144 states have internal predecessors, (189), 25 states have call successors, (25), 9 states have call predecessors, (25), 14 states have return successors, (49), 23 states have call predecessors, (49), 24 states have call successors, (49) [2022-11-02 21:03:05,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 263 transitions. [2022-11-02 21:03:05,201 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 263 transitions. Word has length 68 [2022-11-02 21:03:05,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:05,202 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 263 transitions. [2022-11-02 21:03:05,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 29 states have internal predecessors, (101), 10 states have call successors, (18), 4 states have call predecessors, (18), 9 states have return successors, (17), 6 states have call predecessors, (17), 10 states have call successors, (17) [2022-11-02 21:03:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 263 transitions. [2022-11-02 21:03:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-02 21:03:05,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:05,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:05,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:05,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:05,427 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:05,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:05,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1195332088, now seen corresponding path program 1 times [2022-11-02 21:03:05,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:05,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131021822] [2022-11-02 21:03:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:05,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:05,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:03:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:05,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:03:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:05,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:03:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:05,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-02 21:03:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:05,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:03:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:05,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-02 21:03:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:05,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-02 21:03:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 21:03:05,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:05,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131021822] [2022-11-02 21:03:05,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131021822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:05,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434900724] [2022-11-02 21:03:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:05,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:05,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:05,753 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:05,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:03:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:05,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:03:05,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:03:06,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:06,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434900724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:06,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:03:06,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-11-02 21:03:06,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780239556] [2022-11-02 21:03:06,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:06,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:03:06,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:06,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:03:06,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:03:06,054 INFO L87 Difference]: Start difference. First operand 177 states and 263 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:03:06,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:06,344 INFO L93 Difference]: Finished difference Result 318 states and 481 transitions. [2022-11-02 21:03:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:03:06,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-11-02 21:03:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:06,352 INFO L225 Difference]: With dead ends: 318 [2022-11-02 21:03:06,352 INFO L226 Difference]: Without dead ends: 193 [2022-11-02 21:03:06,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-02 21:03:06,357 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 107 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:06,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 243 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:03:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-02 21:03:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 184. [2022-11-02 21:03:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 142 states have (on average 1.352112676056338) internal successors, (192), 151 states have internal predecessors, (192), 25 states have call successors, (25), 9 states have call predecessors, (25), 16 states have return successors, (55), 23 states have call predecessors, (55), 24 states have call successors, (55) [2022-11-02 21:03:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 272 transitions. [2022-11-02 21:03:06,427 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 272 transitions. Word has length 70 [2022-11-02 21:03:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:06,429 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 272 transitions. [2022-11-02 21:03:06,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:03:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 272 transitions. [2022-11-02 21:03:06,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-02 21:03:06,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:06,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:06,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:06,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:06,656 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:06,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:06,657 INFO L85 PathProgramCache]: Analyzing trace with hash -316025515, now seen corresponding path program 1 times [2022-11-02 21:03:06,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:06,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824958166] [2022-11-02 21:03:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:06,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:06,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:03:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:06,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:03:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:06,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:03:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:06,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 21:03:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:06,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 21:03:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:06,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-02 21:03:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:06,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-02 21:03:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 21:03:07,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:07,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824958166] [2022-11-02 21:03:07,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824958166] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:07,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889116042] [2022-11-02 21:03:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:07,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:07,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:07,004 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:07,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:03:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:07,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:03:07,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:03:07,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:07,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889116042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:07,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:03:07,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-11-02 21:03:07,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792675818] [2022-11-02 21:03:07,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:07,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:03:07,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:07,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:03:07,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:03:07,287 INFO L87 Difference]: Start difference. First operand 184 states and 272 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:03:07,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:07,619 INFO L93 Difference]: Finished difference Result 351 states and 531 transitions. [2022-11-02 21:03:07,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:03:07,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-11-02 21:03:07,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:07,621 INFO L225 Difference]: With dead ends: 351 [2022-11-02 21:03:07,622 INFO L226 Difference]: Without dead ends: 217 [2022-11-02 21:03:07,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:03:07,623 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 144 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:07,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 284 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:03:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-02 21:03:07,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 188. [2022-11-02 21:03:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 146 states have (on average 1.3356164383561644) internal successors, (195), 155 states have internal predecessors, (195), 25 states have call successors, (25), 9 states have call predecessors, (25), 16 states have return successors, (55), 23 states have call predecessors, (55), 24 states have call successors, (55) [2022-11-02 21:03:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 275 transitions. [2022-11-02 21:03:07,651 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 275 transitions. Word has length 72 [2022-11-02 21:03:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:07,651 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 275 transitions. [2022-11-02 21:03:07,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:03:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 275 transitions. [2022-11-02 21:03:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-02 21:03:07,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:07,654 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:07,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:07,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:07,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:07,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1928092350, now seen corresponding path program 1 times [2022-11-02 21:03:07,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:07,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771742817] [2022-11-02 21:03:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:07,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:08,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:03:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:08,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:03:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:08,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:03:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:08,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-02 21:03:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:08,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-02 21:03:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:08,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-02 21:03:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:08,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-02 21:03:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-02 21:03:08,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:08,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771742817] [2022-11-02 21:03:08,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771742817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:08,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199692054] [2022-11-02 21:03:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:08,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:08,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:08,166 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:08,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:03:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:08,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:03:08,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 21:03:08,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:08,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199692054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:08,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:03:08,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-02 21:03:08,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409047559] [2022-11-02 21:03:08,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:08,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:03:08,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:08,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:03:08,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:03:08,376 INFO L87 Difference]: Start difference. First operand 188 states and 275 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:03:08,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:08,404 INFO L93 Difference]: Finished difference Result 296 states and 441 transitions. [2022-11-02 21:03:08,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:03:08,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-11-02 21:03:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:08,407 INFO L225 Difference]: With dead ends: 296 [2022-11-02 21:03:08,408 INFO L226 Difference]: Without dead ends: 151 [2022-11-02 21:03:08,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:03:08,410 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 162 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 21:03:08,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 162 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-02 21:03:08,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 113. [2022-11-02 21:03:08,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 88 states have (on average 1.3409090909090908) internal successors, (118), 91 states have internal predecessors, (118), 16 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (22), 14 states have call predecessors, (22), 15 states have call successors, (22) [2022-11-02 21:03:08,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 156 transitions. [2022-11-02 21:03:08,446 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 156 transitions. Word has length 73 [2022-11-02 21:03:08,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:08,446 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 156 transitions. [2022-11-02 21:03:08,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:03:08,447 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 156 transitions. [2022-11-02 21:03:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-02 21:03:08,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:08,449 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:08,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:08,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:08,672 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:08,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:08,673 INFO L85 PathProgramCache]: Analyzing trace with hash 137287748, now seen corresponding path program 1 times [2022-11-02 21:03:08,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:08,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394813061] [2022-11-02 21:03:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:08,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:08,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:03:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:08,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:03:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:08,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:03:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:09,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:03:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:09,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-02 21:03:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:09,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-02 21:03:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 21:03:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:09,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 21:03:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-02 21:03:09,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:09,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394813061] [2022-11-02 21:03:09,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394813061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:09,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063489463] [2022-11-02 21:03:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:09,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:09,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:09,108 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:09,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:03:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:09,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 21:03:09,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:09,388 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 18 treesize of output 19 [2022-11-02 21:03:09,399 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 18 treesize of output 19 [2022-11-02 21:03:09,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:03:09,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:03:09,486 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 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-02 21:03:09,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:03:09,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:03:09,502 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 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-02 21:03:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:03:11,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:11,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063489463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:11,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:03:11,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2022-11-02 21:03:11,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735254872] [2022-11-02 21:03:11,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:11,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:03:11,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:11,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:03:11,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-02 21:03:11,060 INFO L87 Difference]: Start difference. First operand 113 states and 156 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 21:03:11,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:11,230 INFO L93 Difference]: Finished difference Result 251 states and 354 transitions. [2022-11-02 21:03:11,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:03:11,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 81 [2022-11-02 21:03:11,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:11,235 INFO L225 Difference]: With dead ends: 251 [2022-11-02 21:03:11,236 INFO L226 Difference]: Without dead ends: 194 [2022-11-02 21:03:11,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-11-02 21:03:11,237 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 27 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:11,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 605 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 129 Unchecked, 0.1s Time] [2022-11-02 21:03:11,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-02 21:03:11,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2022-11-02 21:03:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 135 states have (on average 1.3555555555555556) internal successors, (183), 141 states have internal predecessors, (183), 23 states have call successors, (23), 10 states have call predecessors, (23), 14 states have return successors, (35), 21 states have call predecessors, (35), 22 states have call successors, (35) [2022-11-02 21:03:11,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 241 transitions. [2022-11-02 21:03:11,265 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 241 transitions. Word has length 81 [2022-11-02 21:03:11,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:11,266 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 241 transitions. [2022-11-02 21:03:11,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 21:03:11,266 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 241 transitions. [2022-11-02 21:03:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-02 21:03:11,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:11,269 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:11,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:11,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 21:03:11,493 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:11,493 INFO L85 PathProgramCache]: Analyzing trace with hash -672058878, now seen corresponding path program 1 times [2022-11-02 21:03:11,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:11,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994290045] [2022-11-02 21:03:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:11,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:11,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:03:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:11,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:03:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:11,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:03:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:11,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:03:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:11,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-02 21:03:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:11,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-02 21:03:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:11,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 21:03:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:11,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 21:03:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-02 21:03:11,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:11,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994290045] [2022-11-02 21:03:11,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994290045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:11,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219098352] [2022-11-02 21:03:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:11,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:11,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:11,879 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:11,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:03:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:12,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-02 21:03:12,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:12,207 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-02 21:03:12,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-02 21:03:12,226 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:03:12,227 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 21:03:12,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-02 21:03:12,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-02 21:03:12,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-02 21:03:12,292 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 7 treesize of output 3 [2022-11-02 21:03:12,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 21:03:12,868 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-11-02 21:03:12,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 25 [2022-11-02 21:03:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:03:13,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:14,134 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:03:14,134 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 118 treesize of output 120 [2022-11-02 21:03:14,142 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 128 treesize of output 120 [2022-11-02 21:03:14,155 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 64 treesize of output 58 [2022-11-02 21:03:14,165 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 58 treesize of output 54 [2022-11-02 21:03:14,175 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 54 treesize of output 46 [2022-11-02 21:03:14,185 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 59 treesize of output 55 [2022-11-02 21:03:14,242 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 7 treesize of output 3 [2022-11-02 21:03:14,250 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 63 treesize of output 55 [2022-11-02 21:03:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:03:14,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219098352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:14,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:03:14,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 17, 15] total 34 [2022-11-02 21:03:14,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599186083] [2022-11-02 21:03:14,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:14,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 21:03:14,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:14,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 21:03:14,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 21:03:14,390 INFO L87 Difference]: Start difference. First operand 173 states and 241 transitions. Second operand has 34 states, 31 states have (on average 4.096774193548387) internal successors, (127), 33 states have internal predecessors, (127), 11 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-02 21:03:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:17,129 INFO L93 Difference]: Finished difference Result 514 states and 768 transitions. [2022-11-02 21:03:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-02 21:03:17,133 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 4.096774193548387) internal successors, (127), 33 states have internal predecessors, (127), 11 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) Word has length 81 [2022-11-02 21:03:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:17,135 INFO L225 Difference]: With dead ends: 514 [2022-11-02 21:03:17,136 INFO L226 Difference]: Without dead ends: 352 [2022-11-02 21:03:17,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 150 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=363, Invalid=4059, Unknown=0, NotChecked=0, Total=4422 [2022-11-02 21:03:17,141 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 314 mSDsluCounter, 2582 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 2194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 759 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:17,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 2737 Invalid, 2194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1344 Invalid, 0 Unknown, 759 Unchecked, 1.4s Time] [2022-11-02 21:03:17,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-02 21:03:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 228. [2022-11-02 21:03:17,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 184 states have (on average 1.3532608695652173) internal successors, (249), 193 states have internal predecessors, (249), 23 states have call successors, (23), 14 states have call predecessors, (23), 20 states have return successors, (46), 20 states have call predecessors, (46), 22 states have call successors, (46) [2022-11-02 21:03:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 318 transitions. [2022-11-02 21:03:17,181 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 318 transitions. Word has length 81 [2022-11-02 21:03:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:17,181 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 318 transitions. [2022-11-02 21:03:17,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 4.096774193548387) internal successors, (127), 33 states have internal predecessors, (127), 11 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-02 21:03:17,182 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 318 transitions. [2022-11-02 21:03:17,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 21:03:17,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:17,184 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:17,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:17,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:17,408 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:17,409 INFO L85 PathProgramCache]: Analyzing trace with hash 431382673, now seen corresponding path program 1 times [2022-11-02 21:03:17,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:17,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681359091] [2022-11-02 21:03:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:17,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:17,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:03:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:17,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:03:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:17,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:03:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:18,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:03:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:18,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:03:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:18,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 21:03:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:18,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 21:03:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:18,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:03:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 21:03:18,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:18,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681359091] [2022-11-02 21:03:18,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681359091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:18,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818733930] [2022-11-02 21:03:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:18,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:18,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:18,087 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:18,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:03:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:18,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 21:03:18,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:18,364 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:03:18,365 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 21:03:18,427 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:03:18,428 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 21:03:19,799 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0)))) is different from true [2022-11-02 21:03:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 21:03:19,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 21:03:20,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818733930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:20,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:03:20,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 18 [2022-11-02 21:03:20,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732426488] [2022-11-02 21:03:20,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:20,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 21:03:20,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:20,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 21:03:20,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=228, Unknown=1, NotChecked=30, Total=306 [2022-11-02 21:03:20,086 INFO L87 Difference]: Start difference. First operand 228 states and 318 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-02 21:03:20,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:20,863 INFO L93 Difference]: Finished difference Result 721 states and 1104 transitions. [2022-11-02 21:03:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:03:20,863 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 83 [2022-11-02 21:03:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:20,868 INFO L225 Difference]: With dead ends: 721 [2022-11-02 21:03:20,868 INFO L226 Difference]: Without dead ends: 562 [2022-11-02 21:03:20,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=110, Invalid=445, Unknown=1, NotChecked=44, Total=600 [2022-11-02 21:03:20,872 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 215 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:20,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 592 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 471 Invalid, 0 Unknown, 180 Unchecked, 0.5s Time] [2022-11-02 21:03:20,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-11-02 21:03:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 328. [2022-11-02 21:03:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 273 states have (on average 1.358974358974359) internal successors, (371), 283 states have internal predecessors, (371), 30 states have call successors, (30), 18 states have call predecessors, (30), 24 states have return successors, (60), 26 states have call predecessors, (60), 29 states have call successors, (60) [2022-11-02 21:03:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 461 transitions. [2022-11-02 21:03:20,927 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 461 transitions. Word has length 83 [2022-11-02 21:03:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:20,928 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 461 transitions. [2022-11-02 21:03:20,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-02 21:03:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 461 transitions. [2022-11-02 21:03:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 21:03:20,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:20,932 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:20,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-02 21:03:21,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:21,160 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:21,161 INFO L85 PathProgramCache]: Analyzing trace with hash 13986067, now seen corresponding path program 1 times [2022-11-02 21:03:21,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:21,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040152477] [2022-11-02 21:03:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:21,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:21,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:03:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:21,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:03:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:21,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:03:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:21,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:03:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:21,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:03:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:21,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 21:03:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:21,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 21:03:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:21,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:03:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:03:21,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:21,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040152477] [2022-11-02 21:03:21,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040152477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:21,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007443139] [2022-11-02 21:03:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:21,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:21,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:21,459 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:21,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 21:03:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:21,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:03:21,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 21:03:21,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:21,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007443139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:21,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:03:21,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-02 21:03:21,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984773978] [2022-11-02 21:03:21,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:21,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:03:21,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:21,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:03:21,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:03:21,688 INFO L87 Difference]: Start difference. First operand 328 states and 461 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:03:21,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:21,737 INFO L93 Difference]: Finished difference Result 553 states and 799 transitions. [2022-11-02 21:03:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:03:21,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2022-11-02 21:03:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:21,740 INFO L225 Difference]: With dead ends: 553 [2022-11-02 21:03:21,740 INFO L226 Difference]: Without dead ends: 302 [2022-11-02 21:03:21,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:03:21,742 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 8 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:21,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 247 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-02 21:03:21,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 295. [2022-11-02 21:03:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 242 states have (on average 1.334710743801653) internal successors, (323), 252 states have internal predecessors, (323), 29 states have call successors, (29), 17 states have call predecessors, (29), 23 states have return successors, (58), 25 states have call predecessors, (58), 28 states have call successors, (58) [2022-11-02 21:03:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 410 transitions. [2022-11-02 21:03:21,774 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 410 transitions. Word has length 83 [2022-11-02 21:03:21,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:21,774 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 410 transitions. [2022-11-02 21:03:21,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:03:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 410 transitions. [2022-11-02 21:03:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 21:03:21,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:21,776 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:21,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:22,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 21:03:22,000 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:22,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1975560725, now seen corresponding path program 1 times [2022-11-02 21:03:22,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:22,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387412293] [2022-11-02 21:03:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:22,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:22,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:03:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:22,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:03:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:22,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:03:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:22,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:03:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:22,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:03:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:22,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 21:03:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:22,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 21:03:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:22,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:03:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-02 21:03:22,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:22,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387412293] [2022-11-02 21:03:22,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387412293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:22,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308807878] [2022-11-02 21:03:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:22,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:22,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:22,592 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:22,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 21:03:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:22,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:03:22,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:03:22,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:22,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308807878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:22,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:03:22,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-11-02 21:03:22,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077717163] [2022-11-02 21:03:22,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:22,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:03:22,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:22,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:03:22,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:03:22,802 INFO L87 Difference]: Start difference. First operand 295 states and 410 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:03:22,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:22,842 INFO L93 Difference]: Finished difference Result 481 states and 679 transitions. [2022-11-02 21:03:22,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:03:22,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2022-11-02 21:03:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:22,845 INFO L225 Difference]: With dead ends: 481 [2022-11-02 21:03:22,845 INFO L226 Difference]: Without dead ends: 216 [2022-11-02 21:03:22,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:03:22,847 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:22,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 237 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-02 21:03:22,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 194. [2022-11-02 21:03:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 155 states have (on average 1.238709677419355) internal successors, (192), 161 states have internal predecessors, (192), 21 states have call successors, (21), 14 states have call predecessors, (21), 17 states have return successors, (31), 18 states have call predecessors, (31), 20 states have call successors, (31) [2022-11-02 21:03:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 244 transitions. [2022-11-02 21:03:22,868 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 244 transitions. Word has length 83 [2022-11-02 21:03:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:22,869 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 244 transitions. [2022-11-02 21:03:22,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:03:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 244 transitions. [2022-11-02 21:03:22,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 21:03:22,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:22,871 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:22,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:23,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:23,084 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:23,085 INFO L85 PathProgramCache]: Analyzing trace with hash -233275002, now seen corresponding path program 1 times [2022-11-02 21:03:23,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:23,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193879479] [2022-11-02 21:03:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:23,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:23,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:03:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:23,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:03:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:23,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:03:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:23,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:03:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:23,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-02 21:03:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:23,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-02 21:03:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:23,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-02 21:03:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:23,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-02 21:03:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 21:03:23,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:23,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193879479] [2022-11-02 21:03:23,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193879479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:23,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990556505] [2022-11-02 21:03:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:23,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:23,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:23,425 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:23,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 21:03:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:23,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-02 21:03:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:23,724 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:03:23,725 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 21:03:23,746 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:03:23,747 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 21:03:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 21:03:24,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:03:25,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990556505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:25,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:03:25,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 10] total 25 [2022-11-02 21:03:25,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221338141] [2022-11-02 21:03:25,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:25,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 21:03:25,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:25,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 21:03:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-11-02 21:03:25,504 INFO L87 Difference]: Start difference. First operand 194 states and 244 transitions. Second operand has 25 states, 24 states have (on average 5.041666666666667) internal successors, (121), 22 states have internal predecessors, (121), 10 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 9 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-02 21:03:26,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:26,335 INFO L93 Difference]: Finished difference Result 297 states and 373 transitions. [2022-11-02 21:03:26,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 21:03:26,336 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.041666666666667) internal successors, (121), 22 states have internal predecessors, (121), 10 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 9 states have call predecessors, (22), 10 states have call successors, (22) Word has length 84 [2022-11-02 21:03:26,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:26,337 INFO L225 Difference]: With dead ends: 297 [2022-11-02 21:03:26,337 INFO L226 Difference]: Without dead ends: 189 [2022-11-02 21:03:26,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 164 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 21:03:26,339 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 110 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:26,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 736 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 358 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-02 21:03:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-02 21:03:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2022-11-02 21:03:26,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 148 states have (on average 1.2162162162162162) internal successors, (180), 153 states have internal predecessors, (180), 21 states have call successors, (21), 14 states have call predecessors, (21), 16 states have return successors, (28), 18 states have call predecessors, (28), 20 states have call successors, (28) [2022-11-02 21:03:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 229 transitions. [2022-11-02 21:03:26,362 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 229 transitions. Word has length 84 [2022-11-02 21:03:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:26,363 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 229 transitions. [2022-11-02 21:03:26,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.041666666666667) internal successors, (121), 22 states have internal predecessors, (121), 10 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 9 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-02 21:03:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 229 transitions. [2022-11-02 21:03:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-02 21:03:26,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:26,365 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 21:03:26,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:26,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:26,576 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:26,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash -413998114, now seen corresponding path program 1 times [2022-11-02 21:03:26,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:26,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196315592] [2022-11-02 21:03:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:26,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:26,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:03:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:26,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:03:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:26,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:03:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:26,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:03:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:26,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-02 21:03:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:26,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-02 21:03:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:26,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-02 21:03:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:26,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-02 21:03:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 21:03:26,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:26,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196315592] [2022-11-02 21:03:26,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196315592] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:26,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280686700] [2022-11-02 21:03:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:26,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:26,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:26,912 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:26,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 21:03:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:27,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:03:27,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 21:03:27,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:27,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280686700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:27,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:03:27,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-11-02 21:03:27,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246341609] [2022-11-02 21:03:27,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:27,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:03:27,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:27,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:03:27,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:03:27,260 INFO L87 Difference]: Start difference. First operand 186 states and 229 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 21:03:27,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:27,495 INFO L93 Difference]: Finished difference Result 248 states and 306 transitions. [2022-11-02 21:03:27,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:03:27,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2022-11-02 21:03:27,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:27,498 INFO L225 Difference]: With dead ends: 248 [2022-11-02 21:03:27,498 INFO L226 Difference]: Without dead ends: 158 [2022-11-02 21:03:27,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:03:27,499 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 106 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:27,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 292 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:03:27,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-02 21:03:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2022-11-02 21:03:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 125 states have (on average 1.216) internal successors, (152), 127 states have internal predecessors, (152), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (20), 16 states have call predecessors, (20), 18 states have call successors, (20) [2022-11-02 21:03:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 191 transitions. [2022-11-02 21:03:27,521 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 191 transitions. Word has length 86 [2022-11-02 21:03:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:27,521 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 191 transitions. [2022-11-02 21:03:27,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 21:03:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 191 transitions. [2022-11-02 21:03:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 21:03:27,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:27,523 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:27,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:27,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 21:03:27,736 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:27,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:27,737 INFO L85 PathProgramCache]: Analyzing trace with hash -806881120, now seen corresponding path program 1 times [2022-11-02 21:03:27,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:27,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103715843] [2022-11-02 21:03:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:27,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:27,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:03:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:27,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:03:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:27,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:03:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:27,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:03:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:27,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-02 21:03:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:27,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-02 21:03:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:28,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:03:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:28,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 21:03:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:28,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-02 21:03:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-02 21:03:28,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:28,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103715843] [2022-11-02 21:03:28,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103715843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:28,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967822882] [2022-11-02 21:03:28,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:28,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:28,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:28,092 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:28,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 21:03:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:28,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 21:03:28,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 21:03:28,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-02 21:03:28,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967822882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:28,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:03:28,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 7] total 18 [2022-11-02 21:03:28,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144226428] [2022-11-02 21:03:28,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:28,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 21:03:28,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:28,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 21:03:28,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:03:28,755 INFO L87 Difference]: Start difference. First operand 156 states and 191 transitions. Second operand has 18 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-02 21:03:29,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:29,001 INFO L93 Difference]: Finished difference Result 233 states and 291 transitions. [2022-11-02 21:03:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:03:29,002 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2022-11-02 21:03:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:29,003 INFO L225 Difference]: With dead ends: 233 [2022-11-02 21:03:29,003 INFO L226 Difference]: Without dead ends: 170 [2022-11-02 21:03:29,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:03:29,005 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 15 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:29,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 959 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:03:29,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-02 21:03:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2022-11-02 21:03:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 100 states have (on average 1.22) internal successors, (122), 101 states have internal predecessors, (122), 17 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-11-02 21:03:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 156 transitions. [2022-11-02 21:03:29,026 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 156 transitions. Word has length 97 [2022-11-02 21:03:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:29,026 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 156 transitions. [2022-11-02 21:03:29,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-02 21:03:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 156 transitions. [2022-11-02 21:03:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-02 21:03:29,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:29,028 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:29,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:29,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 21:03:29,236 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:29,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:29,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1617876444, now seen corresponding path program 1 times [2022-11-02 21:03:29,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:29,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563659827] [2022-11-02 21:03:29,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:29,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:30,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:03:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:30,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:03:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:30,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 21:03:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:30,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:03:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:30,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 21:03:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:30,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 21:03:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:30,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:03:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:30,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-02 21:03:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:30,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-02 21:03:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 21:03:30,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:30,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563659827] [2022-11-02 21:03:30,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563659827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:30,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146811577] [2022-11-02 21:03:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:30,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:03:30,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:30,533 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:03:30,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 21:03:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:30,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-02 21:03:30,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:30,912 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-02 21:03:30,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:03:30,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 21:03:31,010 INFO L356 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-02 21:03:31,012 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-02 21:03:31,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:31,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 21:03:31,237 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: var is still there: |v_#memory_$Pointer$.base_47| input size 44 context size 44 output size 44 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:122) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-02 21:03:31,240 INFO L158 Benchmark]: Toolchain (without parser) took 39082.12ms. Allocated memory was 98.6MB in the beginning and 360.7MB in the end (delta: 262.1MB). Free memory was 55.9MB in the beginning and 241.4MB in the end (delta: -185.5MB). Peak memory consumption was 77.6MB. Max. memory is 16.1GB. [2022-11-02 21:03:31,240 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 98.6MB. Free memory is still 78.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 21:03:31,240 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2479.25ms. Allocated memory was 98.6MB in the beginning and 138.4MB in the end (delta: 39.8MB). Free memory was 76.9MB in the beginning and 83.2MB in the end (delta: -6.3MB). Peak memory consumption was 57.9MB. Max. memory is 16.1GB. [2022-11-02 21:03:31,241 INFO L158 Benchmark]: Boogie Procedure Inliner took 171.86ms. Allocated memory is still 138.4MB. Free memory was 83.2MB in the beginning and 77.6MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-02 21:03:31,241 INFO L158 Benchmark]: Boogie Preprocessor took 70.98ms. Allocated memory is still 138.4MB. Free memory was 77.6MB in the beginning and 74.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 21:03:31,241 INFO L158 Benchmark]: RCFGBuilder took 786.83ms. Allocated memory is still 138.4MB. Free memory was 74.8MB in the beginning and 90.3MB in the end (delta: -15.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-02 21:03:31,241 INFO L158 Benchmark]: TraceAbstraction took 35537.38ms. Allocated memory was 138.4MB in the beginning and 360.7MB in the end (delta: 222.3MB). Free memory was 90.3MB in the beginning and 241.4MB in the end (delta: -151.1MB). Peak memory consumption was 71.1MB. Max. memory is 16.1GB. [2022-11-02 21:03:31,243 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 98.6MB. Free memory is still 78.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2479.25ms. Allocated memory was 98.6MB in the beginning and 138.4MB in the end (delta: 39.8MB). Free memory was 76.9MB in the beginning and 83.2MB in the end (delta: -6.3MB). Peak memory consumption was 57.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 171.86ms. Allocated memory is still 138.4MB. Free memory was 83.2MB in the beginning and 77.6MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 70.98ms. Allocated memory is still 138.4MB. Free memory was 77.6MB in the beginning and 74.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 786.83ms. Allocated memory is still 138.4MB. Free memory was 74.8MB in the beginning and 90.3MB in the end (delta: -15.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 35537.38ms. Allocated memory was 138.4MB in the beginning and 360.7MB in the end (delta: 222.3MB). Free memory was 90.3MB in the beginning and 241.4MB in the end (delta: -151.1MB). Peak memory consumption was 71.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: |v_#memory_$Pointer$.base_47| input size 44 context size 44 output size 44 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: |v_#memory_$Pointer$.base_47| input size 44 context size 44 output size 44: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-02 21:03:31,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/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 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 --- 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 21:03:33,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:03:33,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:03:33,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:03:33,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:03:33,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:03:33,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:03:33,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:03:33,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:03:33,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:03:33,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:03:33,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:03:33,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:03:33,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:03:33,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:03:33,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:03:33,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:03:33,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:03:33,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:03:33,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:03:33,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:03:33,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:03:33,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:03:33,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:03:33,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:03:33,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:03:33,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:03:33,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:03:33,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:03:33,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:03:33,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:03:33,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:03:33,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:03:33,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:03:33,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:03:33,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:03:33,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:03:33,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:03:33,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:03:33,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:03:33,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:03:33,962 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-02 21:03:34,009 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:03:34,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:03:34,011 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:03:34,011 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:03:34,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:03:34,012 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:03:34,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:03:34,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:03:34,015 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:03:34,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:03:34,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:03:34,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:03:34,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:03:34,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:03:34,017 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 21:03:34,017 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 21:03:34,018 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 21:03:34,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:03:34,018 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:03:34,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:03:34,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:03:34,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:03:34,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:03:34,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:03:34,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:03:34,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:03:34,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:03:34,020 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 21:03:34,020 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 21:03:34,021 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:03:34,021 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:03:34,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:03:34,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 21:03:34,022 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 [2022-11-02 21:03:34,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:03:34,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:03:34,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:03:34,467 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:03:34,470 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:03:34,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2022-11-02 21:03:34,545 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/data/582b327ea/68a6c5d3577449eda17f85bbf84af90d/FLAG32d2132f2 [2022-11-02 21:03:35,400 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:03:35,401 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2022-11-02 21:03:35,442 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/data/582b327ea/68a6c5d3577449eda17f85bbf84af90d/FLAG32d2132f2 [2022-11-02 21:03:35,952 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/data/582b327ea/68a6c5d3577449eda17f85bbf84af90d [2022-11-02 21:03:35,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:03:35,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:03:35,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:03:35,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:03:35,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:03:35,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:03:35" (1/1) ... [2022-11-02 21:03:35,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@454b701e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:35, skipping insertion in model container [2022-11-02 21:03:35,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:03:35" (1/1) ... [2022-11-02 21:03:35,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:03:36,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:03:36,363 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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2022-11-02 21:03:36,371 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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2022-11-02 21:03:37,248 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:37,248 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:37,249 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:37,250 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:37,251 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:37,278 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:37,280 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:37,282 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:37,283 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:37,286 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:37,287 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:37,288 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:37,288 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:37,728 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 21:03:37,731 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 21:03:37,732 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 21:03:37,736 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 21:03:37,741 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 21:03:37,743 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 21:03:37,744 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 21:03:37,746 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 21:03:37,747 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 21:03:37,748 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 21:03:37,913 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 21:03:37,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:03:37,962 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-02 21:03:38,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:03:38,019 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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2022-11-02 21:03:38,020 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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2022-11-02 21:03:38,112 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,115 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,116 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,117 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,118 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,130 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,138 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,140 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,141 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,142 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,143 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,143 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,144 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,214 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 21:03:38,215 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 21:03:38,216 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 21:03:38,217 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 21:03:38,224 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 21:03:38,224 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 21:03:38,225 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 21:03:38,226 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 21:03:38,227 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 21:03:38,227 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 21:03:38,265 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 21:03:38,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:03:38,300 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:03:38,337 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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2022-11-02 21:03:38,342 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_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2022-11-02 21:03:38,398 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,399 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,399 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,401 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,402 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,414 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,414 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,416 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,416 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,417 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,418 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,419 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,419 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:38,459 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 21:03:38,459 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 21:03:38,460 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 21:03:38,461 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 21:03:38,463 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 21:03:38,463 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 21:03:38,464 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 21:03:38,464 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 21:03:38,465 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 21:03:38,465 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 21:03:38,486 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 21:03:38,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:03:38,800 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:03:38,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:38 WrapperNode [2022-11-02 21:03:38,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:03:38,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:03:38,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:03:38,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:03:38,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:38" (1/1) ... [2022-11-02 21:03:38,934 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:38" (1/1) ... [2022-11-02 21:03:38,991 INFO L138 Inliner]: procedures = 698, calls = 1041, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 143 [2022-11-02 21:03:38,992 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:03:38,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:03:38,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:03:38,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:03:39,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:38" (1/1) ... [2022-11-02 21:03:39,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:38" (1/1) ... [2022-11-02 21:03:39,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:38" (1/1) ... [2022-11-02 21:03:39,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:38" (1/1) ... [2022-11-02 21:03:39,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:38" (1/1) ... [2022-11-02 21:03:39,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:38" (1/1) ... [2022-11-02 21:03:39,035 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:38" (1/1) ... [2022-11-02 21:03:39,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:38" (1/1) ... [2022-11-02 21:03:39,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:03:39,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:03:39,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:03:39,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:03:39,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:38" (1/1) ... [2022-11-02 21:03:39,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:03:39,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:39,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:03:39,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:03:39,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:03:39,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-02 21:03:39,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 21:03:39,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 21:03:39,126 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-02 21:03:39,126 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-02 21:03:39,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 21:03:39,127 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-02 21:03:39,127 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-02 21:03:39,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:03:39,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 21:03:39,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:03:39,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:03:39,128 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 21:03:39,128 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 21:03:39,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:03:39,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 21:03:39,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 21:03:39,129 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-02 21:03:39,129 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-02 21:03:39,462 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:03:39,465 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:03:39,921 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:03:39,928 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:03:39,929 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 21:03:39,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:03:39 BoogieIcfgContainer [2022-11-02 21:03:39,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:03:39,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:03:39,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:03:39,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:03:39,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:03:35" (1/3) ... [2022-11-02 21:03:39,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21898deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:03:39, skipping insertion in model container [2022-11-02 21:03:39,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:38" (2/3) ... [2022-11-02 21:03:39,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21898deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:03:39, skipping insertion in model container [2022-11-02 21:03:39,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:03:39" (3/3) ... [2022-11-02 21:03:39,948 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rbegin_harness.i [2022-11-02 21:03:39,973 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:03:39,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:03:40,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:03:40,074 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;@5949d15c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:03:40,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:03:40,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-02 21:03:40,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 21:03:40,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:40,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:40,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:40,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:40,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1062572114, now seen corresponding path program 1 times [2022-11-02 21:03:40,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:40,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318565037] [2022-11-02 21:03:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:40,133 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:40,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:40,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:40,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 21:03:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:40,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 21:03:40,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-02 21:03:40,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:40,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:40,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318565037] [2022-11-02 21:03:40,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318565037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:40,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:40,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:03:40,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625578974] [2022-11-02 21:03:40,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:40,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 21:03:40,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:40,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 21:03:40,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:03:40,625 INFO L87 Difference]: Start difference. First operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:03:40,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:40,679 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2022-11-02 21:03:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 21:03:40,681 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2022-11-02 21:03:40,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:40,694 INFO L225 Difference]: With dead ends: 130 [2022-11-02 21:03:40,694 INFO L226 Difference]: Without dead ends: 64 [2022-11-02 21:03:40,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:03:40,707 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:40,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:40,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-02 21:03:40,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-02 21:03:40,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-02 21:03:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2022-11-02 21:03:40,779 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 68 [2022-11-02 21:03:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:40,781 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2022-11-02 21:03:40,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:03:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2022-11-02 21:03:40,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 21:03:40,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:40,790 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:40,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-02 21:03:41,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:41,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:41,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:41,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1946087212, now seen corresponding path program 1 times [2022-11-02 21:03:41,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:41,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849514135] [2022-11-02 21:03:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:41,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:41,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:41,010 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:41,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 21:03:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:41,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 21:03:41,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:03:41,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:41,423 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:41,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849514135] [2022-11-02 21:03:41,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849514135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:41,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:41,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:03:41,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590975789] [2022-11-02 21:03:41,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:41,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:03:41,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:41,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:03:41,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:03:41,427 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 21:03:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:41,557 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2022-11-02 21:03:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:03:41,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2022-11-02 21:03:41,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:41,565 INFO L225 Difference]: With dead ends: 116 [2022-11-02 21:03:41,565 INFO L226 Difference]: Without dead ends: 66 [2022-11-02 21:03:41,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:03:41,570 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:41,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 375 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:03:41,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-02 21:03:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-02 21:03:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 48 states have internal predecessors, (59), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2022-11-02 21:03:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2022-11-02 21:03:41,597 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 68 [2022-11-02 21:03:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:41,598 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2022-11-02 21:03:41,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 21:03:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2022-11-02 21:03:41,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-02 21:03:41,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:41,609 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:41,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:41,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:41,827 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:41,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:41,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1195332088, now seen corresponding path program 1 times [2022-11-02 21:03:41,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:41,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224725962] [2022-11-02 21:03:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:41,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:41,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:41,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:41,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 21:03:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:42,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:03:42,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:03:42,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:42,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:42,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224725962] [2022-11-02 21:03:42,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224725962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:42,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:42,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:03:42,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009004804] [2022-11-02 21:03:42,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:42,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:03:42,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:42,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:03:42,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:03:42,216 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:03:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:42,503 INFO L93 Difference]: Finished difference Result 121 states and 163 transitions. [2022-11-02 21:03:42,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:03:42,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-11-02 21:03:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:42,505 INFO L225 Difference]: With dead ends: 121 [2022-11-02 21:03:42,506 INFO L226 Difference]: Without dead ends: 69 [2022-11-02 21:03:42,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:03:42,507 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 39 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:42,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 283 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:03:42,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-02 21:03:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-02 21:03:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 51 states have internal predecessors, (61), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 21:03:42,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2022-11-02 21:03:42,530 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 70 [2022-11-02 21:03:42,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:42,532 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2022-11-02 21:03:42,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:03:42,533 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2022-11-02 21:03:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-02 21:03:42,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:42,536 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:42,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-02 21:03:42,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:42,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:42,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:42,754 INFO L85 PathProgramCache]: Analyzing trace with hash -316025515, now seen corresponding path program 1 times [2022-11-02 21:03:42,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:42,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450103829] [2022-11-02 21:03:42,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:42,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:42,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:42,757 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:42,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 21:03:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:43,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:03:43,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:03:43,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:43,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:43,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450103829] [2022-11-02 21:03:43,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450103829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:43,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:43,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:03:43,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238299086] [2022-11-02 21:03:43,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:43,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:03:43,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:43,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:03:43,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:03:43,164 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:03:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:43,527 INFO L93 Difference]: Finished difference Result 136 states and 187 transitions. [2022-11-02 21:03:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:03:43,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-11-02 21:03:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:43,531 INFO L225 Difference]: With dead ends: 136 [2022-11-02 21:03:43,531 INFO L226 Difference]: Without dead ends: 81 [2022-11-02 21:03:43,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:03:43,533 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:43,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 336 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:03:43,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-02 21:03:43,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2022-11-02 21:03:43,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.28) internal successors, (64), 53 states have internal predecessors, (64), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 21:03:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2022-11-02 21:03:43,545 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 72 [2022-11-02 21:03:43,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:43,545 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2022-11-02 21:03:43,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:03:43,546 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2022-11-02 21:03:43,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-02 21:03:43,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:43,550 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:43,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-02 21:03:43,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:43,764 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:43,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:43,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1928092350, now seen corresponding path program 1 times [2022-11-02 21:03:43,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:43,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085738753] [2022-11-02 21:03:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:43,766 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:43,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:43,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:43,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 21:03:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:44,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:03:44,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 21:03:44,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:44,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:44,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085738753] [2022-11-02 21:03:44,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085738753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:44,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:44,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:03:44,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305750961] [2022-11-02 21:03:44,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:44,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:03:44,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:44,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:03:44,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:03:44,166 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:03:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:44,431 INFO L93 Difference]: Finished difference Result 137 states and 191 transitions. [2022-11-02 21:03:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:03:44,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-11-02 21:03:44,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:44,433 INFO L225 Difference]: With dead ends: 137 [2022-11-02 21:03:44,433 INFO L226 Difference]: Without dead ends: 80 [2022-11-02 21:03:44,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:03:44,435 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 48 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:44,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 276 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:03:44,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-02 21:03:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2022-11-02 21:03:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 54 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 21:03:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2022-11-02 21:03:44,448 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 73 [2022-11-02 21:03:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:44,448 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2022-11-02 21:03:44,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:03:44,449 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2022-11-02 21:03:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-02 21:03:44,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:44,450 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:44,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:44,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:44,664 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash 137287748, now seen corresponding path program 1 times [2022-11-02 21:03:44,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:44,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960771166] [2022-11-02 21:03:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:44,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:44,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:44,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:44,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 21:03:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:44,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:03:44,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:03:45,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:45,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:45,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960771166] [2022-11-02 21:03:45,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960771166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:45,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:45,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:03:45,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709930560] [2022-11-02 21:03:45,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:45,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:03:45,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:45,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:03:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:03:45,016 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 21:03:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:45,136 INFO L93 Difference]: Finished difference Result 136 states and 183 transitions. [2022-11-02 21:03:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:03:45,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2022-11-02 21:03:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:45,139 INFO L225 Difference]: With dead ends: 136 [2022-11-02 21:03:45,139 INFO L226 Difference]: Without dead ends: 78 [2022-11-02 21:03:45,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:03:45,141 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 4 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:45,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 463 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:03:45,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-02 21:03:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-11-02 21:03:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 55 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 21:03:45,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2022-11-02 21:03:45,160 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 81 [2022-11-02 21:03:45,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:45,161 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2022-11-02 21:03:45,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 21:03:45,161 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2022-11-02 21:03:45,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 21:03:45,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:45,163 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:45,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:45,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:45,389 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:45,390 INFO L85 PathProgramCache]: Analyzing trace with hash 431382673, now seen corresponding path program 1 times [2022-11-02 21:03:45,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:45,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104860545] [2022-11-02 21:03:45,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:45,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:45,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:45,393 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:45,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 21:03:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:45,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 21:03:45,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 21:03:46,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 21:03:46,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:46,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104860545] [2022-11-02 21:03:46,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104860545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:46,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:46,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-11-02 21:03:46,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030527465] [2022-11-02 21:03:46,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:46,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:03:46,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:46,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:03:46,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:03:46,930 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-02 21:03:47,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:47,932 INFO L93 Difference]: Finished difference Result 177 states and 254 transitions. [2022-11-02 21:03:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:03:47,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 83 [2022-11-02 21:03:47,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:47,935 INFO L225 Difference]: With dead ends: 177 [2022-11-02 21:03:47,935 INFO L226 Difference]: Without dead ends: 118 [2022-11-02 21:03:47,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:03:47,937 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 109 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:47,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 599 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 166 Invalid, 0 Unknown, 114 Unchecked, 0.6s Time] [2022-11-02 21:03:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-02 21:03:47,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2022-11-02 21:03:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 70 states have internal predecessors, (87), 14 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-02 21:03:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2022-11-02 21:03:47,966 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 83 [2022-11-02 21:03:47,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:47,966 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2022-11-02 21:03:47,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-02 21:03:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2022-11-02 21:03:47,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 21:03:47,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:47,968 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:47,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:48,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:48,181 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash 13986067, now seen corresponding path program 1 times [2022-11-02 21:03:48,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:48,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4835049] [2022-11-02 21:03:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:48,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:48,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:48,182 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:48,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 21:03:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:48,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:03:48,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 21:03:48,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:48,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:48,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4835049] [2022-11-02 21:03:48,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4835049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:48,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:48,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:03:48,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253566994] [2022-11-02 21:03:48,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:48,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:03:48,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:48,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:03:48,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:03:48,438 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:03:48,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:48,492 INFO L93 Difference]: Finished difference Result 169 states and 235 transitions. [2022-11-02 21:03:48,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:03:48,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2022-11-02 21:03:48,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:48,496 INFO L225 Difference]: With dead ends: 169 [2022-11-02 21:03:48,497 INFO L226 Difference]: Without dead ends: 93 [2022-11-02 21:03:48,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:03:48,498 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 8 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:48,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 247 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-02 21:03:48,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2022-11-02 21:03:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 70 states have internal predecessors, (86), 14 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-02 21:03:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 118 transitions. [2022-11-02 21:03:48,533 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 118 transitions. Word has length 83 [2022-11-02 21:03:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:48,534 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 118 transitions. [2022-11-02 21:03:48,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:03:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 118 transitions. [2022-11-02 21:03:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 21:03:48,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:48,536 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:48,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:48,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:48,760 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:48,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1975560725, now seen corresponding path program 1 times [2022-11-02 21:03:48,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:48,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124321410] [2022-11-02 21:03:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:48,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:48,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:48,762 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:48,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 21:03:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:49,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:03:49,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:03:49,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:49,074 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:49,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124321410] [2022-11-02 21:03:49,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124321410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:49,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:49,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:03:49,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268208177] [2022-11-02 21:03:49,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:49,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:03:49,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:49,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:03:49,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:03:49,077 INFO L87 Difference]: Start difference. First operand 90 states and 118 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:03:49,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:49,162 INFO L93 Difference]: Finished difference Result 167 states and 231 transitions. [2022-11-02 21:03:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:03:49,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2022-11-02 21:03:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:49,166 INFO L225 Difference]: With dead ends: 167 [2022-11-02 21:03:49,166 INFO L226 Difference]: Without dead ends: 91 [2022-11-02 21:03:49,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:03:49,170 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 6 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:49,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 315 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:49,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-02 21:03:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2022-11-02 21:03:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.25) internal successors, (80), 67 states have internal predecessors, (80), 14 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-02 21:03:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2022-11-02 21:03:49,194 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 83 [2022-11-02 21:03:49,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:49,195 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2022-11-02 21:03:49,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:03:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2022-11-02 21:03:49,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 21:03:49,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:49,196 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:49,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:49,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:49,417 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:49,417 INFO L85 PathProgramCache]: Analyzing trace with hash -233275002, now seen corresponding path program 1 times [2022-11-02 21:03:49,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:49,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125239366] [2022-11-02 21:03:49,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:49,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:49,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:49,419 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:49,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 21:03:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:49,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 21:03:49,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:03:51,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:55,202 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 21:03:55,203 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 30 treesize of output 25 [2022-11-02 21:03:55,234 INFO L356 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-02 21:03:55,234 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 12 [2022-11-02 21:03:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:03:55,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:55,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125239366] [2022-11-02 21:03:55,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125239366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:55,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:55,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2022-11-02 21:03:55,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580437039] [2022-11-02 21:03:55,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:55,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 21:03:55,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 21:03:55,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:03:55,298 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 19 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-02 21:03:56,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:56,580 INFO L93 Difference]: Finished difference Result 182 states and 232 transitions. [2022-11-02 21:03:56,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 21:03:56,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) Word has length 84 [2022-11-02 21:03:56,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:56,583 INFO L225 Difference]: With dead ends: 182 [2022-11-02 21:03:56,583 INFO L226 Difference]: Without dead ends: 108 [2022-11-02 21:03:56,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:03:56,585 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 82 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:56,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 535 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 192 Invalid, 0 Unknown, 99 Unchecked, 0.9s Time] [2022-11-02 21:03:56,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-02 21:03:56,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2022-11-02 21:03:56,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 70 states have internal predecessors, (82), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-02 21:03:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 114 transitions. [2022-11-02 21:03:56,602 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 114 transitions. Word has length 84 [2022-11-02 21:03:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:56,602 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 114 transitions. [2022-11-02 21:03:56,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-02 21:03:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 114 transitions. [2022-11-02 21:03:56,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 21:03:56,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:56,604 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:56,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:56,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:56,812 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:56,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:56,813 INFO L85 PathProgramCache]: Analyzing trace with hash -980582014, now seen corresponding path program 1 times [2022-11-02 21:03:56,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:56,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239676512] [2022-11-02 21:03:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:56,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:56,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:56,815 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:56,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-02 21:03:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:57,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 21:03:57,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:57,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-02 21:03:57,257 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 6 treesize of output 5 [2022-11-02 21:03:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:03:58,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:58,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:58,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239676512] [2022-11-02 21:03:58,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239676512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:58,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:58,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 21:03:58,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166863059] [2022-11-02 21:03:58,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:58,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:03:58,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:58,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:03:58,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:03:58,533 INFO L87 Difference]: Start difference. First operand 91 states and 114 transitions. Second operand has 11 states, 10 states have (on average 6.6) internal successors, (66), 11 states have internal predecessors, (66), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-02 21:03:58,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:58,995 INFO L93 Difference]: Finished difference Result 237 states and 301 transitions. [2022-11-02 21:03:58,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:03:58,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.6) internal successors, (66), 11 states have internal predecessors, (66), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 84 [2022-11-02 21:03:58,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:58,998 INFO L225 Difference]: With dead ends: 237 [2022-11-02 21:03:58,998 INFO L226 Difference]: Without dead ends: 164 [2022-11-02 21:03:58,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:03:58,999 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 36 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:59,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 559 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-11-02 21:03:59,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-02 21:03:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 147. [2022-11-02 21:03:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 113 states have (on average 1.247787610619469) internal successors, (141), 118 states have internal predecessors, (141), 19 states have call successors, (19), 11 states have call predecessors, (19), 14 states have return successors, (24), 17 states have call predecessors, (24), 18 states have call successors, (24) [2022-11-02 21:03:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 184 transitions. [2022-11-02 21:03:59,047 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 184 transitions. Word has length 84 [2022-11-02 21:03:59,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:59,049 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 184 transitions. [2022-11-02 21:03:59,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.6) internal successors, (66), 11 states have internal predecessors, (66), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-02 21:03:59,050 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 184 transitions. [2022-11-02 21:03:59,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 21:03:59,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:59,055 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:59,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:59,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:59,272 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:59,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:59,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1490055104, now seen corresponding path program 1 times [2022-11-02 21:03:59,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:59,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676906461] [2022-11-02 21:03:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:59,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:59,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:59,275 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:59,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 21:03:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:59,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 21:03:59,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:04:01,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:05,757 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:04:05,757 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 30 treesize of output 29 [2022-11-02 21:04:05,806 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 21:04:05,807 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 19 [2022-11-02 21:04:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:04:05,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:05,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676906461] [2022-11-02 21:04:05,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676906461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:05,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:05,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2022-11-02 21:04:05,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144573872] [2022-11-02 21:04:05,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:05,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 21:04:05,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:05,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 21:04:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:04:05,860 INFO L87 Difference]: Start difference. First operand 147 states and 184 transitions. Second operand has 23 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-02 21:04:09,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:09,531 INFO L93 Difference]: Finished difference Result 276 states and 344 transitions. [2022-11-02 21:04:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 21:04:09,532 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) Word has length 84 [2022-11-02 21:04:09,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:09,534 INFO L225 Difference]: With dead ends: 276 [2022-11-02 21:04:09,534 INFO L226 Difference]: Without dead ends: 185 [2022-11-02 21:04:09,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 21:04:09,536 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 145 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:09,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 772 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 341 Invalid, 0 Unknown, 144 Unchecked, 1.5s Time] [2022-11-02 21:04:09,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-02 21:04:09,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 151. [2022-11-02 21:04:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 117 states have (on average 1.2307692307692308) internal successors, (144), 121 states have internal predecessors, (144), 19 states have call successors, (19), 12 states have call predecessors, (19), 14 states have return successors, (24), 17 states have call predecessors, (24), 18 states have call successors, (24) [2022-11-02 21:04:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 187 transitions. [2022-11-02 21:04:09,577 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 187 transitions. Word has length 84 [2022-11-02 21:04:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:09,577 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 187 transitions. [2022-11-02 21:04:09,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-02 21:04:09,578 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 187 transitions. [2022-11-02 21:04:09,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 21:04:09,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:09,579 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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 21:04:09,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-02 21:04:09,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:09,798 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:09,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1467422850, now seen corresponding path program 1 times [2022-11-02 21:04:09,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:09,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955615306] [2022-11-02 21:04:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:09,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:09,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:09,800 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:09,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 21:04:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:10,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 21:04:10,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:11,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:12,393 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 19 treesize of output 11 [2022-11-02 21:04:12,776 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:04:12,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-02 21:04:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:04:13,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:13,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955615306] [2022-11-02 21:04:13,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955615306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:13,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:13,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2022-11-02 21:04:13,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201136218] [2022-11-02 21:04:13,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:13,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 21:04:13,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:13,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 21:04:13,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:04:13,265 INFO L87 Difference]: Start difference. First operand 151 states and 187 transitions. Second operand has 27 states, 25 states have (on average 4.48) internal successors, (112), 25 states have internal predecessors, (112), 9 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-02 21:04:16,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:16,480 INFO L93 Difference]: Finished difference Result 345 states and 467 transitions. [2022-11-02 21:04:16,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 21:04:16,481 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.48) internal successors, (112), 25 states have internal predecessors, (112), 9 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 84 [2022-11-02 21:04:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:16,484 INFO L225 Difference]: With dead ends: 345 [2022-11-02 21:04:16,484 INFO L226 Difference]: Without dead ends: 261 [2022-11-02 21:04:16,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 21:04:16,487 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 190 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:16,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 1008 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 621 Invalid, 0 Unknown, 212 Unchecked, 2.1s Time] [2022-11-02 21:04:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-02 21:04:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 210. [2022-11-02 21:04:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 160 states have (on average 1.20625) internal successors, (193), 166 states have internal predecessors, (193), 29 states have call successors, (29), 16 states have call predecessors, (29), 20 states have return successors, (54), 27 states have call predecessors, (54), 28 states have call successors, (54) [2022-11-02 21:04:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 276 transitions. [2022-11-02 21:04:16,557 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 276 transitions. Word has length 84 [2022-11-02 21:04:16,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:16,558 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 276 transitions. [2022-11-02 21:04:16,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.48) internal successors, (112), 25 states have internal predecessors, (112), 9 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-02 21:04:16,559 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 276 transitions. [2022-11-02 21:04:16,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 21:04:16,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:16,561 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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 21:04:16,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:16,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:16,780 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:16,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:16,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1192663236, now seen corresponding path program 1 times [2022-11-02 21:04:16,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:16,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169230529] [2022-11-02 21:04:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:16,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:16,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:16,784 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:16,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 21:04:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:17,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:04:17,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 21:04:17,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:17,103 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:17,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169230529] [2022-11-02 21:04:17,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169230529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:17,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:17,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:04:17,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776339174] [2022-11-02 21:04:17,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:17,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:04:17,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:17,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:04:17,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:04:17,105 INFO L87 Difference]: Start difference. First operand 210 states and 276 transitions. Second operand has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 21:04:17,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:17,282 INFO L93 Difference]: Finished difference Result 460 states and 626 transitions. [2022-11-02 21:04:17,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:04:17,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 84 [2022-11-02 21:04:17,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:17,285 INFO L225 Difference]: With dead ends: 460 [2022-11-02 21:04:17,285 INFO L226 Difference]: Without dead ends: 197 [2022-11-02 21:04:17,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:17,288 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 50 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:17,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 332 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:17,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-02 21:04:17,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2022-11-02 21:04:17,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 145 states have (on average 1.1793103448275861) internal successors, (171), 152 states have internal predecessors, (171), 29 states have call successors, (29), 15 states have call predecessors, (29), 20 states have return successors, (54), 27 states have call predecessors, (54), 28 states have call successors, (54) [2022-11-02 21:04:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 254 transitions. [2022-11-02 21:04:17,336 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 254 transitions. Word has length 84 [2022-11-02 21:04:17,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:17,337 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 254 transitions. [2022-11-02 21:04:17,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 21:04:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 254 transitions. [2022-11-02 21:04:17,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-02 21:04:17,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:17,340 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:17,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:17,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:17,561 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:17,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:17,562 INFO L85 PathProgramCache]: Analyzing trace with hash -20971104, now seen corresponding path program 1 times [2022-11-02 21:04:17,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:17,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632183117] [2022-11-02 21:04:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:17,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:17,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:17,563 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:17,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-02 21:04:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:17,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:04:17,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 21:04:17,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:17,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:17,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632183117] [2022-11-02 21:04:17,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632183117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:17,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:17,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:04:17,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493262774] [2022-11-02 21:04:17,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:17,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:04:17,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:17,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:04:17,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:17,955 INFO L87 Difference]: Start difference. First operand 195 states and 254 transitions. Second operand has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 21:04:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:18,311 INFO L93 Difference]: Finished difference Result 289 states and 383 transitions. [2022-11-02 21:04:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:04:18,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2022-11-02 21:04:18,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:18,316 INFO L225 Difference]: With dead ends: 289 [2022-11-02 21:04:18,316 INFO L226 Difference]: Without dead ends: 194 [2022-11-02 21:04:18,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:04:18,320 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 44 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:18,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 322 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:04:18,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-02 21:04:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2022-11-02 21:04:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 143 states have (on average 1.167832167832168) internal successors, (167), 149 states have internal predecessors, (167), 29 states have call successors, (29), 15 states have call predecessors, (29), 19 states have return successors, (50), 27 states have call predecessors, (50), 28 states have call successors, (50) [2022-11-02 21:04:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 246 transitions. [2022-11-02 21:04:18,367 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 246 transitions. Word has length 86 [2022-11-02 21:04:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:18,368 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 246 transitions. [2022-11-02 21:04:18,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 21:04:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 246 transitions. [2022-11-02 21:04:18,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-02 21:04:18,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:18,373 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:18,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:18,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:18,592 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:18,592 INFO L85 PathProgramCache]: Analyzing trace with hash 428580672, now seen corresponding path program 1 times [2022-11-02 21:04:18,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:18,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553486607] [2022-11-02 21:04:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:18,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:18,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:18,594 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:18,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-02 21:04:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:18,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 21:04:18,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:19,189 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-02 21:04:19,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-02 21:04:19,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-11-02 21:04:19,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 [2022-11-02 21:04:19,328 INFO L356 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2022-11-02 21:04:19,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 46 [2022-11-02 21:04:19,332 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 30 treesize of output 18 [2022-11-02 21:04:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:04:20,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:20,380 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:20,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553486607] [2022-11-02 21:04:20,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553486607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:20,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:20,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 21:04:20,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715283001] [2022-11-02 21:04:20,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:20,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:04:20,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:20,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:04:20,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:04:20,383 INFO L87 Difference]: Start difference. First operand 192 states and 246 transitions. Second operand has 11 states, 10 states have (on average 6.8) internal successors, (68), 11 states have internal predecessors, (68), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-02 21:04:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:20,923 INFO L93 Difference]: Finished difference Result 356 states and 467 transitions. [2022-11-02 21:04:20,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:04:20,925 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.8) internal successors, (68), 11 states have internal predecessors, (68), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 86 [2022-11-02 21:04:20,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:20,927 INFO L225 Difference]: With dead ends: 356 [2022-11-02 21:04:20,927 INFO L226 Difference]: Without dead ends: 267 [2022-11-02 21:04:20,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:04:20,928 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 34 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:20,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 522 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 114 Unchecked, 0.3s Time] [2022-11-02 21:04:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-02 21:04:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 236. [2022-11-02 21:04:20,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 181 states have (on average 1.1823204419889504) internal successors, (214), 188 states have internal predecessors, (214), 31 states have call successors, (31), 18 states have call predecessors, (31), 23 states have return successors, (44), 29 states have call predecessors, (44), 30 states have call successors, (44) [2022-11-02 21:04:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 289 transitions. [2022-11-02 21:04:20,982 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 289 transitions. Word has length 86 [2022-11-02 21:04:20,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:20,982 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 289 transitions. [2022-11-02 21:04:20,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.8) internal successors, (68), 11 states have internal predecessors, (68), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-02 21:04:20,983 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 289 transitions. [2022-11-02 21:04:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 21:04:20,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:20,985 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:21,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:21,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:21,196 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:21,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:21,197 INFO L85 PathProgramCache]: Analyzing trace with hash -806881120, now seen corresponding path program 1 times [2022-11-02 21:04:21,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:21,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177469265] [2022-11-02 21:04:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:21,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:21,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:21,200 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:21,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-02 21:04:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:21,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 21:04:21,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 51 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:28,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:51,220 INFO L356 Elim1Store]: treesize reduction 17, result has 82.8 percent of original size [2022-11-02 21:04:51,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 129 [2022-11-02 21:04:51,862 INFO L356 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2022-11-02 21:04:51,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 132 [2022-11-02 21:04:58,592 INFO L356 Elim1Store]: treesize reduction 17, result has 82.8 percent of original size [2022-11-02 21:04:58,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 125 [2022-11-02 21:04:59,233 INFO L356 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2022-11-02 21:04:59,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 132 [2022-11-02 21:05:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 21:05:00,550 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:05:00,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177469265] [2022-11-02 21:05:00,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177469265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:00,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:05:00,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2022-11-02 21:05:00,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879127326] [2022-11-02 21:05:00,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:00,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-02 21:05:00,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:05:00,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-02 21:05:00,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1346, Unknown=3, NotChecked=0, Total=1482 [2022-11-02 21:05:00,554 INFO L87 Difference]: Start difference. First operand 236 states and 289 transitions. Second operand has 39 states, 37 states have (on average 3.4594594594594597) internal successors, (128), 33 states have internal predecessors, (128), 11 states have call successors, (19), 3 states have call predecessors, (19), 11 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2022-11-02 21:05:09,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 21:05:12,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 21:05:14,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 21:05:17,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 21:05:19,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 21:05:41,895 WARN L234 SmtUtils]: Spent 20.50s on a formula simplification. DAG size of input: 67 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:05:47,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 21:05:51,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 21:05:53,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 21:05:56,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 21:05:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:56,917 INFO L93 Difference]: Finished difference Result 564 states and 755 transitions. [2022-11-02 21:05:56,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-02 21:05:56,919 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 3.4594594594594597) internal successors, (128), 33 states have internal predecessors, (128), 11 states have call successors, (19), 3 states have call predecessors, (19), 11 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) Word has length 97 [2022-11-02 21:05:56,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:56,922 INFO L225 Difference]: With dead ends: 564 [2022-11-02 21:05:56,922 INFO L226 Difference]: Without dead ends: 483 [2022-11-02 21:05:56,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 51.8s TimeCoverageRelationStatistics Valid=320, Invalid=3456, Unknown=6, NotChecked=0, Total=3782 [2022-11-02 21:05:56,925 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 158 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 99 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 844 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:56,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 1712 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1154 Invalid, 9 Unknown, 844 Unchecked, 24.4s Time] [2022-11-02 21:05:56,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-02 21:05:57,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 355. [2022-11-02 21:05:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 272 states have (on average 1.1838235294117647) internal successors, (322), 280 states have internal predecessors, (322), 47 states have call successors, (47), 24 states have call predecessors, (47), 35 states have return successors, (76), 50 states have call predecessors, (76), 46 states have call successors, (76) [2022-11-02 21:05:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 445 transitions. [2022-11-02 21:05:57,018 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 445 transitions. Word has length 97 [2022-11-02 21:05:57,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:57,019 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 445 transitions. [2022-11-02 21:05:57,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 3.4594594594594597) internal successors, (128), 33 states have internal predecessors, (128), 11 states have call successors, (19), 3 states have call predecessors, (19), 11 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2022-11-02 21:05:57,019 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 445 transitions. [2022-11-02 21:05:57,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 21:05:57,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:57,022 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:05:57,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:57,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:05:57,244 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:57,244 INFO L85 PathProgramCache]: Analyzing trace with hash -838641764, now seen corresponding path program 1 times [2022-11-02 21:05:57,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:05:57,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619058344] [2022-11-02 21:05:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:57,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:05:57,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:05:57,246 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:05:57,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 21:05:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:57,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:05:57,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-02 21:05:58,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:05:58,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:05:58,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619058344] [2022-11-02 21:05:58,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619058344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:58,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:58,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 21:05:58,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019712034] [2022-11-02 21:05:58,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:58,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:05:58,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:05:58,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:05:58,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:05:58,976 INFO L87 Difference]: Start difference. First operand 355 states and 445 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-02 21:05:59,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:59,518 INFO L93 Difference]: Finished difference Result 657 states and 858 transitions. [2022-11-02 21:05:59,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 21:05:59,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 97 [2022-11-02 21:05:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:59,522 INFO L225 Difference]: With dead ends: 657 [2022-11-02 21:05:59,523 INFO L226 Difference]: Without dead ends: 367 [2022-11-02 21:05:59,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:05:59,531 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 35 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:59,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 468 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2022-11-02 21:05:59,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-02 21:05:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2022-11-02 21:05:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 282 states have (on average 1.177304964539007) internal successors, (332), 290 states have internal predecessors, (332), 47 states have call successors, (47), 24 states have call predecessors, (47), 35 states have return successors, (76), 50 states have call predecessors, (76), 46 states have call successors, (76) [2022-11-02 21:05:59,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 455 transitions. [2022-11-02 21:05:59,616 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 455 transitions. Word has length 97 [2022-11-02 21:05:59,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:59,617 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 455 transitions. [2022-11-02 21:05:59,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-02 21:05:59,617 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 455 transitions. [2022-11-02 21:05:59,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 21:05:59,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:59,620 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:05:59,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:59,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:05:59,840 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:59,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1295849576, now seen corresponding path program 1 times [2022-11-02 21:05:59,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:05:59,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539223148] [2022-11-02 21:05:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:59,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:05:59,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:05:59,843 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:05:59,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 21:06:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:00,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 21:06:00,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:06:00,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:06:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 21:06:00,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:06:00,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539223148] [2022-11-02 21:06:00,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539223148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:06:00,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:06:00,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-02 21:06:00,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651304439] [2022-11-02 21:06:00,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:06:00,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:06:00,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:06:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:06:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:06:00,752 INFO L87 Difference]: Start difference. First operand 365 states and 455 transitions. Second operand has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 5 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-02 21:06:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:01,594 INFO L93 Difference]: Finished difference Result 834 states and 1056 transitions. [2022-11-02 21:06:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:06:01,595 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 5 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2022-11-02 21:06:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:01,597 INFO L225 Difference]: With dead ends: 834 [2022-11-02 21:06:01,597 INFO L226 Difference]: Without dead ends: 487 [2022-11-02 21:06:01,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-11-02 21:06:01,600 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 94 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:01,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 558 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:06:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-02 21:06:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 362. [2022-11-02 21:06:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 285 states have (on average 1.2105263157894737) internal successors, (345), 296 states have internal predecessors, (345), 40 states have call successors, (40), 21 states have call predecessors, (40), 36 states have return successors, (67), 44 states have call predecessors, (67), 39 states have call successors, (67) [2022-11-02 21:06:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 452 transitions. [2022-11-02 21:06:01,701 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 452 transitions. Word has length 97 [2022-11-02 21:06:01,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:01,702 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 452 transitions. [2022-11-02 21:06:01,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 5 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-02 21:06:01,702 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 452 transitions. [2022-11-02 21:06:01,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-02 21:06:01,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:01,705 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 21:06:01,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:01,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:06:01,919 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:01,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:01,919 INFO L85 PathProgramCache]: Analyzing trace with hash -695722547, now seen corresponding path program 1 times [2022-11-02 21:06:01,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:06:01,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655869976] [2022-11-02 21:06:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:01,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:06:01,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:06:01,923 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:06:01,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 21:06:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:02,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 21:06:02,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 21:06:02,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:06:03,800 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 21:06:03,800 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 23 [2022-11-02 21:06:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 21:06:03,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:06:03,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655869976] [2022-11-02 21:06:03,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655869976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:06:03,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:06:03,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-02 21:06:03,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69844524] [2022-11-02 21:06:03,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:06:03,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 21:06:03,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:06:03,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 21:06:03,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:06:03,960 INFO L87 Difference]: Start difference. First operand 362 states and 452 transitions. Second operand has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 12 states have internal predecessors, (78), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-02 21:06:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:05,362 INFO L93 Difference]: Finished difference Result 733 states and 964 transitions. [2022-11-02 21:06:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:06:05,364 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 12 states have internal predecessors, (78), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 94 [2022-11-02 21:06:05,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:05,366 INFO L225 Difference]: With dead ends: 733 [2022-11-02 21:06:05,367 INFO L226 Difference]: Without dead ends: 465 [2022-11-02 21:06:05,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:06:05,369 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 39 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:05,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 582 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 143 Invalid, 0 Unknown, 111 Unchecked, 0.6s Time] [2022-11-02 21:06:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-02 21:06:05,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 380. [2022-11-02 21:06:05,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 300 states have (on average 1.2166666666666666) internal successors, (365), 309 states have internal predecessors, (365), 40 states have call successors, (40), 21 states have call predecessors, (40), 39 states have return successors, (75), 49 states have call predecessors, (75), 39 states have call successors, (75) [2022-11-02 21:06:05,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 480 transitions. [2022-11-02 21:06:05,476 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 480 transitions. Word has length 94 [2022-11-02 21:06:05,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:05,477 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 480 transitions. [2022-11-02 21:06:05,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 12 states have internal predecessors, (78), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-02 21:06:05,477 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 480 transitions. [2022-11-02 21:06:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-02 21:06:05,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:05,479 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 21:06:05,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:05,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:06:05,692 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:05,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:05,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1176802805, now seen corresponding path program 1 times [2022-11-02 21:06:05,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:06:05,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172278389] [2022-11-02 21:06:05,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:05,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:06:05,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:06:05,695 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:06:05,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 21:06:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:05,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:06:05,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 21:06:06,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:06,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:06:06,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172278389] [2022-11-02 21:06:06,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172278389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:06,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:06,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:06:06,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79133398] [2022-11-02 21:06:06,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:06,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:06:06,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:06:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:06:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:06:06,018 INFO L87 Difference]: Start difference. First operand 380 states and 480 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-02 21:06:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:06,121 INFO L93 Difference]: Finished difference Result 675 states and 875 transitions. [2022-11-02 21:06:06,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:06:06,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2022-11-02 21:06:06,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:06,125 INFO L225 Difference]: With dead ends: 675 [2022-11-02 21:06:06,125 INFO L226 Difference]: Without dead ends: 377 [2022-11-02 21:06:06,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:06:06,127 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:06,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 317 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:06:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-02 21:06:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 370. [2022-11-02 21:06:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 290 states have (on average 1.1689655172413793) internal successors, (339), 301 states have internal predecessors, (339), 40 states have call successors, (40), 21 states have call predecessors, (40), 39 states have return successors, (75), 47 states have call predecessors, (75), 39 states have call successors, (75) [2022-11-02 21:06:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 454 transitions. [2022-11-02 21:06:06,227 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 454 transitions. Word has length 94 [2022-11-02 21:06:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:06,228 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 454 transitions. [2022-11-02 21:06:06,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-02 21:06:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 454 transitions. [2022-11-02 21:06:06,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-02 21:06:06,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:06,232 INFO L195 NwaCegarLoop]: trace histogram [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 21:06:06,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:06,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:06:06,453 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:06,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:06,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1850898618, now seen corresponding path program 2 times [2022-11-02 21:06:06,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:06:06,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855901034] [2022-11-02 21:06:06,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:06:06,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:06:06,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:06:06,455 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:06:06,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-02 21:06:06,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:06:06,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:06:06,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 21:06:06,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:06,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-02 21:06:06,993 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 6 treesize of output 5 [2022-11-02 21:06:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:06:08,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:08,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:06:08,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855901034] [2022-11-02 21:06:08,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855901034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:08,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:08,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 21:06:08,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784386993] [2022-11-02 21:06:08,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:08,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:06:08,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:06:08,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:06:08,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:06:08,772 INFO L87 Difference]: Start difference. First operand 370 states and 454 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 21:06:09,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:09,305 INFO L93 Difference]: Finished difference Result 569 states and 708 transitions. [2022-11-02 21:06:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 21:06:09,306 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 95 [2022-11-02 21:06:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:09,309 INFO L225 Difference]: With dead ends: 569 [2022-11-02 21:06:09,310 INFO L226 Difference]: Without dead ends: 471 [2022-11-02 21:06:09,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:06:09,313 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 30 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:09,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 549 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 106 Unchecked, 0.3s Time] [2022-11-02 21:06:09,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-11-02 21:06:09,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 438. [2022-11-02 21:06:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 342 states have (on average 1.1666666666666667) internal successors, (399), 356 states have internal predecessors, (399), 48 states have call successors, (48), 25 states have call predecessors, (48), 47 states have return successors, (89), 56 states have call predecessors, (89), 47 states have call successors, (89) [2022-11-02 21:06:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 536 transitions. [2022-11-02 21:06:09,436 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 536 transitions. Word has length 95 [2022-11-02 21:06:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:09,436 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 536 transitions. [2022-11-02 21:06:09,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 21:06:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 536 transitions. [2022-11-02 21:06:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-02 21:06:09,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:09,439 INFO L195 NwaCegarLoop]: trace histogram [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 21:06:09,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:09,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:06:09,652 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:09,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:09,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1716037046, now seen corresponding path program 3 times [2022-11-02 21:06:09,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:06:09,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921863323] [2022-11-02 21:06:09,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:06:09,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:06:09,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:06:09,654 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:06:09,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 21:06:09,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 21:06:09,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:06:09,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 21:06:09,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 21:06:09,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:09,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:06:09,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921863323] [2022-11-02 21:06:09,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921863323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:09,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:09,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:06:09,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879171563] [2022-11-02 21:06:09,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:09,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:06:09,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:06:09,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:06:09,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:06:09,924 INFO L87 Difference]: Start difference. First operand 438 states and 536 transitions. Second operand has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 21:06:10,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:10,090 INFO L93 Difference]: Finished difference Result 592 states and 723 transitions. [2022-11-02 21:06:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:06:10,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 95 [2022-11-02 21:06:10,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:10,095 INFO L225 Difference]: With dead ends: 592 [2022-11-02 21:06:10,095 INFO L226 Difference]: Without dead ends: 430 [2022-11-02 21:06:10,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:06:10,097 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 2 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:10,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 366 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:06:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-11-02 21:06:10,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 424. [2022-11-02 21:06:10,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 328 states have (on average 1.1676829268292683) internal successors, (383), 343 states have internal predecessors, (383), 48 states have call successors, (48), 24 states have call predecessors, (48), 47 states have return successors, (89), 56 states have call predecessors, (89), 47 states have call successors, (89) [2022-11-02 21:06:10,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 520 transitions. [2022-11-02 21:06:10,223 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 520 transitions. Word has length 95 [2022-11-02 21:06:10,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:10,224 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 520 transitions. [2022-11-02 21:06:10,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 21:06:10,224 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 520 transitions. [2022-11-02 21:06:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-02 21:06:10,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:10,226 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:06:10,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:10,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:06:10,444 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:10,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1020688030, now seen corresponding path program 1 times [2022-11-02 21:06:10,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:06:10,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125851789] [2022-11-02 21:06:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:10,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:06:10,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:06:10,447 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:06:10,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 21:06:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:10,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:06:10,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 21:06:10,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:10,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:06:10,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125851789] [2022-11-02 21:06:10,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125851789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:10,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:10,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:06:10,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915564190] [2022-11-02 21:06:10,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:10,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:06:10,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:06:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:06:10,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:06:10,973 INFO L87 Difference]: Start difference. First operand 424 states and 520 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 5 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 21:06:11,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:11,615 INFO L93 Difference]: Finished difference Result 732 states and 931 transitions. [2022-11-02 21:06:11,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:06:11,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 5 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 99 [2022-11-02 21:06:11,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:11,619 INFO L225 Difference]: With dead ends: 732 [2022-11-02 21:06:11,619 INFO L226 Difference]: Without dead ends: 406 [2022-11-02 21:06:11,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-02 21:06:11,621 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 69 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:11,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 458 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:06:11,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-11-02 21:06:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 354. [2022-11-02 21:06:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 272 states have (on average 1.1176470588235294) internal successors, (304), 280 states have internal predecessors, (304), 45 states have call successors, (45), 24 states have call predecessors, (45), 36 states have return successors, (67), 49 states have call predecessors, (67), 44 states have call successors, (67) [2022-11-02 21:06:11,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 416 transitions. [2022-11-02 21:06:11,713 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 416 transitions. Word has length 99 [2022-11-02 21:06:11,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:11,714 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 416 transitions. [2022-11-02 21:06:11,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 5 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 21:06:11,714 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 416 transitions. [2022-11-02 21:06:11,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-02 21:06:11,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:11,716 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:06:11,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:11,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:06:11,935 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1870368, now seen corresponding path program 1 times [2022-11-02 21:06:11,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:06:11,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419628658] [2022-11-02 21:06:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:11,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:06:11,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:06:11,938 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:06:11,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc4d41be-ecf5-4e76-b004-54561d5d3f1b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-02 21:06:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:12,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-02 21:06:12,254 INFO L286 TraceCheckSpWp]: Computing forward predicates...